Family Isoetaceae, genus Isoetes;
world species list.


By Michael Hassler and Brian Swale.      

A list of the species of the genus Isoetes, giving current name, authority, synonyms, published references, geographic distribution and (sometimes) illustrations.
Please note: an asterisk * in the distribution list means that the species is exotic to the country named.


003.000 Order Isoetales Engler; Syllabus der Pflanzenfamilien, ed. 7, 101 (1912) Statistics: 1 genus, ca. 140 spp. = Isoeteae Barling; Ord. Nat. Plant., p. 16 (1830) = Isoetariae Koidz, Acta Phytotax. & Geobot. 7: 11 (1938) 003.0000 Family Isoetaceae Reichenb.; H. G. L. Consp. Reg. Veg., 43 (1828) Trivial names: Brachsenkräuter Statistics: 1 genus, ca. 140 spp. [143 species and 15 hybrids listed] = Bothriaceae Dulac; Flore des Hautes-Pyrénées, p. 38 (1867)
003.0001 Isoetes L.; Sp. Pl. 1100 (1753) Statistics: ca. 140 spp. worldwide [143 species and 15 hybrids listed] Revision date: 20.07.2001 Trivial names: Brachsenkraut = Calamaria Boehm.; Definitiones Generum Plantarum 500 (1760) = Calamaria Dillen; Hist. Musc. 541, t. 80, fig. 2.1741 = Cephaloceraton Gennari; Comment. Soc. Crittogam. Ital. 1: 111 (1862) = Isoetella Gennari; Comment. Soc. Crittogam. Ital. 1: 114 (1862) = Sivetes Raf.; Med. Repos. 11. 5: 358 (1808) = Stylites Amstutz; Ann. Missouri Bot. Gard. 44: 121 (1957) = Subularia Ray; Syn. Meth. Stirp. Brit., 283 (1696) (Pre-Linnaean) Isoetes abyssinica Chiovenda; Atti Soc. Nat. e Mat., Modena 64: 45-47, illus (1933) Isoetes acadiensis Kott; Canad. J. Bot. 59: 2592 (1981) Trivial names: Acadian Quillwort Isoetes aequinoctialis Welw. ex A. Braun; Sitzungsber. Naturf. Fr. Berlin 7 (1867) Isoetes alcalophila Halloy; Lilloa 35(2): 68 (1980) Isoetes alpina Kirk; Trans. N. Z. Inst. 7: 377, t. 25 (1875) Isoetes andicola (Amstutz) L.D. Gómez; Brenesia 18: 4 (1980) Isoetes andina Spruce ex Hook.; British Ferns ad t. 55 (1861) Isoetes asiatica (Makino) Makino; Bot. Mag. Tokyo 28: 184 (1914) Isoetes attenuata C. R. Marsden & Chinnock; Fl. Australia 48: 704 (1998) Isoetes australis S. Williams; Proc. Roy. Soc. Edinb. 62B(l). 1-8 (1943) Isoetes azorica Dur.; Milde, Fil. Eur., 278 (1867) Isoetes baculata Hickey & H.P.Fuchs; Syst. Bot. 11(2): 310 (1986) Isoetes biafrana Alston; Bol. Soc. Brot., ser. 2A, 30: 15 (1956) Isoetes bischlerae H.P.Fuchs; Proc. Kon. Ned. Akad. Wetensch. C 85(1): 113 (1982) Isoetes bolanderi Engelm.; Amer. Nat. 8: 214 (1874) Trivial names: Bolander's Quillwort var. pygmaea (Engelm.) Clute; Fern Allies, 228, 258 (1905) Isoetes boliviensis Weber; Hedwigia 63: 247, fig. 14-15 (1922) Isoetes boomii Luebke; Amer. Fern J. 82: 23 (1992) Isoetes boryana Durieu; Bull. Soc. Bot. France 8: 164 (1861) Isoetes boyacensis H.P.Fuchs; Proc. Kon. Ned. Akad. Wetensch. C 85(1): 107 (1982) Isoetes bradei Herter; Revista Sudamericana de Botánica 8: 19 (1949) Isoetes brasiliensis H.P.Fuchs; Fl. Illustr. Catar. 1 (Isoetaceae): 27 (1986) Isoetes brevicula E.R.L.Johnson; J. Roy. Soc. W. Australia 67(1): 34 (1984) Isoetes brochonii Moteley; Actes Soc. Linn. Bordeaux 45: 45 (1892) Trivial names: Pyrenäen-Brachsenkraut Isoetes butleri Engelm.; Bot. Gaz. 3: 1 (1878) Trivial names: Butler's Quillwort Isoetes capensis Duthie; Trans. R. Soc. S. Afr. 17: 330 (1929) var. stephansenii (A.V.Duthie) Schelpe & N.C.Anthony; Bothalia 15(3-4): 555 (1985) Isoetes caroli E.R.L. Johnson; J. Roy. Soc. W. Austratia 67(1): 34 (1984) Isoetes caroliniana (A.A. Eaton) Luebke; Amer. Fern J. 82: 26 (1992) Isoetes castillonii H. P. Fuchs Isoetes chaeturetii Mendes; Agron. Lusit. 23: 7 (1961) Isoetes clavata Weber; Berichte Deut. Bot. Gesellsch. 52: 121 (1934) Isoetes cleeffii H. P. Fuchs; Proc. Kon. Nederl. Akad. Wetensch. C 84(2): 177 (1981) Isoetes colombiana (T.C. Palmer) H. P. Fuchs; Proc. Kon. Ned. Akad. Wetensch. C 84(2): 176 (1981) Isoetes coreana Y.H. Chung & H.K. Choi; Korean J. Pl. Taxon 16(1): 2 (1986) Isoetes coromandelina L. f.; Suppl. Pl. Syst. Veg. ed. Il: 447 (1781) (coromandeliana) ssp. coromandelina L. f.; Suppl. Pl. Syst. Veg. ed. Il: 447 (1781) ssp. macrotuberculata C.R. Marsden; Contr. Herb. Austral. 24: 2 (1976) Isoetes cristata C. R. Marsden & Chinnock; Fl. Australia 48: 704 (1998) Isoetes cubana Engelm. ex Baker; Journal of Botany, British and Foreign 18: 110 (1880) Isoetes dichotoma L.E.Mora & W.Hagemann; Mutisia 43: 5 (1977) Isoetes dispora Hickey; Fieldiana, Bot. 34: 93 (1994) Isoetes drummondii A. Br.; Monatsber. K. Akad. Wiss. Berlin, 593 (1863) ssp. drummondii A. Br.; Monatsber. K. Akad. Wiss. Berlin, 593 (1863) ssp. anomala C.R.Marsden & Chinnock; Muelleria 8(1): 58 (1993) Isoetes durieui Bory; Compt. Rend. Acad. Paris 18: 1166 (1844) Trivial names: Durieus Brachsenkraut Isoetes echinospora Durieu; Bull. Soc. Bot. France 8: 164 (1861) Trivial names: Stachelsporiges Brachsenkraut, Quillwort Isoetes ecuadoriensis Aspl.; Botaniska Notiser 1925: 357, f. (1925) Isoetes ekmanii Weber; Hedwigia 63: 251. fig. 26-27 (1922) Isoetes elatior F. Muell. & A. Br.; Linnaea 25: 722 (1852) Isoetes engelmannii A. Br.; Flora 29: 178 (1846) Trivial names: Engelmann's Quillwort var. georgiana Engelm.; Transactions of the Academy of Science of St. Louis 4: 384 (1882) Isoetes escondidensis Halloy; Lilloa 35(2): 67 (1980) Isoetes eshbaughii Hickey; Syst. Bot. I1(2): 310 (1986) Isoetes flaccida Shuttlew.; A. Br., Flora 29: 178 (1846) Isoetes fuscomarginata H.P.Fuchs; Fl. Illustr. Catar. 1 (Isoetac.): 12 (1986) Isoetes gardneriana Kunze ex Mett.; Fil. Lechl. Fasc. 11: 36 (1859) Isoetes georgiana Luebke; Amer. Fern J. 82: 24 (1992) Isoetes gigantea U. Weber; Nova Hedwigia 63: 245 (1922) Isoetes goebelii Weber; Hedwigia 63: '247, fig. 16-17 (1922) Isoetes gunnii A. Braun; Monatsber. Königl. Preuss. Akad. Wiss. 535 (1868) Isoetes habbemensis Alston; J. Arn. Arb. 26 (1945) 180 Isoetes hawaiiensis W.C.Taylor & W.H.Wagner; Amer. Fern J. 83(2): 67 (1993) Isoetes heldreichii Wettst.; Verhandlungen der Kaiserlich-Königlichen Trivial names: Griechisches Brachsenkraut Isoetes herzogii Weber; Hedwigia 63: 250, fig. 22-23 (1922) Isoetes hewitsonii Hickey; Fieldiana, Bot. 34: 94 (1994) Isoetes hieronymi Weber; Hedwigia 63: 251, fig. 24-25 (1922) Isoetes histrix Bory & Dur.; Compt. Rend. Hebd. Séances Acad. Sci. 18: 1167 (1844) Trivial names: Stacheliges Brachsenkraut Isoetes hopei J. R. Croft; Blumea 26 (1980) 177-190 Isoetes howellii Engelm.; Trans. Acad. Sci. St. Louis 4: 385 (1882) Isoetes humilior F. Muell. ex A. Br.; Linnaea 25: 722 (1852) Isoetes hyemalis D.F.Brunt.; Castanea 59(1): 13 (1994) Isoetes hypsophila Hand.-Mazz.; Anzeiger Acad. Wiss. Wien. Nr. 13: 95 (1923) Isoetes inflata E.R.L. Johnson; J. Roy. Soc. W. Australia 67(1): 37 (1984) Isoetes jaegeri Pitot; Bull. Inst. Fond. Afr. Noire, A, 30: 58, f. 1-19 (1968) Isoetes jamaicensis Hickey; Amer. Fern J. 71(3): 69 (1981) Isoetes japonica A. Br.; Monatsber. K. Akad. Wiss. Berl. 1: 459 (1861) Isoetes killipii C.V. Morton; American Fern Journal 35: 49 (1945) Isoetes kirkii A. Br.; Monatsber. K. Akad. Wiss. Berlin. 649 (1869) Isoetes lacustris L.; Sp. Pl.: 1100 (1753) Trivial names: See-Brachsenkraut Isoetes lechleri Mett.; Fil. Lechler. 2: 36 (1859) Isoetes lithophila Pfeiffer; Ann. Missouri Bot. Gard. 9: 135 (1922) Trivial names: Rock Quillwort Isoetes louisianensis Thieret; Sida 5: 129 (1973) Trivial names: Louisiana Quillwort Isoetes luetzelburgii Weber ex Luetzelburg; Estud. Bot. Nordeste 3: 257 (no date) Isoetes malinverniana Cesati & De Not.; Index Sem. Hort. Genuensis 1858: 36 (1858) Isoetes maritima Underw.; Bot. Gaz. 13: 94 (1888) Trivial names: Spiny-spored Quillwort Isoetes martii A. Br.; ex Kuhn, Martius, Fl. Bras. 1 (2): 646, t. 78 (1884) Isoetes melanopoda Gay & Dur.; Bull. Soc. Bot. France 11: 102 (1864) Trivial names: Black-footed Quillwort f. pallida (Engelm.) Fernald Isoetes melanospora Engelm.; Trans. Acad. Sci. St. Louis 3: 395 (1877) Trivial names: Black-spored Quillwort Isoetes melanotheca Alston; Bol. Soc. Brot., sér. 2A, 30: 15 (1956) Isoetes mexicana Underw.; Botanical Gazette 13: 93 (1888) Isoetes microvela D.F. Brunt & D.M. Britton; Rhodora 100(903): 270-274, f. 1-3, 4e-h, 5 (1998) Isoetes mongerensis E.R.L. Johnson; J. Roy. Soc. W. Australia 67(1): 39 (1984) Isoetes montana Weber; Hedwigia 63: 254, fig. 38-39 (1922) Isoetes muelleri A. Br.; Monatsber. K. Akad. Wiss. Berlin 541 (1868) Isoetes neoguineensis Baker ex F. v. M.; Ann. Rep. Brit. N. Guinea 1897-8 (1898) 149 [nomen var. rheophila J. R. Croft; Blumea 26 (1980) 177-190 Isoetes novo-granadensis H.P. Fuchs; Caldasia 8: 314 (1969) Isoetes nuttallii A. Braun ex Engelm.; Amer. Naturalist 8: 215 (1874) Trivial names: Nuttall's Quillwort Isoetes occidentalis Hend.; Bull. Torr. Bot. Cl. 27: 358 (1900) Trivial names: Western Quillwort Isoetes olympica A. Braun; Milde; Pl. Eur.: 285 (1867) Isoetes orcuttii Eaton; Fern Bull. 6: 30 (1898) (nom. nud.), 8: 13 (1900) Trivial names: Orcutt's Quillwort Isoetes organensis Weber; Luetzelburg, Estud. Bot. Nordeste 3: 256 (no date) Isoetes ovata N. Pfeiff.; Annals of the Missouri Botanical Garden 8(2): 109 (1922) Isoetes pallida Hickey; Amer. Fern J. 78(1): 35 (1988) Isoetes palmeri H.P.Fuchs; Proc. Kon. Ned. Akad. Wetensch. C 84(2): 168 (1981) Isoetes panamensis Maxon & C.V. Morton; Annals of the Missouri Botanical Garden 26(4): 272 (1939) Isoetes parvula Hickey; Fieldiana, Bot. 34: 92 (1994) Isoetes pedersenii H.P. Fuchs ex Hickey Isoetes perrieriana Iversen; Dansk Botanisk Arkiv 7: 200-201 (1932) Isoetes philippinensis Merrill & Perry; Am. Fern Journ. 30 (1940) 19, fig. Isoetes piedmontana (N. Pfeiffer) C. Reed; Phytologia 12: 392 (1965) Isoetes pitotii Alston; Bol. Soc. Broter., 2A, 30: 15 (1956) Isoetes pringlei Underw.; Zoë 1: 98 (1890) Isoetes prototypus D.M. Britton; Canad. J. Bot. 69: 278 (1991) Isoetes pseudojaponica M. Takamiya & al. Isoetes pusilla C.R.Marsden & R.J.Chinnock; Muelleria 8(1): 57 (1993) Isoetes quilindanensis H. P. Fuchs Isoetes ramboi Herter; Rev. Sudamer. Bot. 8 (1-2): 19-25 (1949) Isoetes rimbachii H.P.Fuchs; Proc. Kon. Ned. Akad. Wetensch. C 85(2): 226 (1982) [nom. nov. Isoetes riparia Engelm. ex A. Br.; Flora (Regensb. Bot. Zeit.) 29: 178 (1846) Trivial names: Shore Quillwort var. amesii (Eaton) Proctor; Amer. Fern Journ. 39: 119 (1949) var. canadensis Engelm.; Trans. St. Louis Acad. Sci. 4: 383 (1882) var. palmeri (Eaton ) Proctor; Amer. Fern Journ. 39: 119 (1949) var. reticulata (Eaton) Proctor; Amer. Fern Journ. 39: 119 (1949) var. robbinsii (Eaton) Proctor; Amer. Fern Journ. 39: 119 (1949) Isoetes saracochensis Hickey; Fieldiana, Bot. 34: 94 (1994) Isoetes savatieri Franchet; Bull. Soc. Bot. Fr. 31: 395 (1884) Isoetes schinzii H.P. Fuchs Isoetes schweinfurthii A. Braun; Journal of Botany, British and Foreign 18: 108 (1880) Isoetes sehnemii H.P.Fuchs; Fl. Illustr. Catar. 1 (Isoetaceae): 38 (1986) Isoetes semilocularis J. E. Smith; Rees, Cyclopaedia 19: 150 (1819) Isoetes setacea Lam.; Encyclopédie Méthodique, Botanique 3: 314 (1789) Isoetes sinensis Palmer; Amer. Fern J. 17: 112 (1927) var. coreana (Y. H. Chung & H. K. Choi) M. Takamiya & al. Isoetes smithii H.P.Fuchs; Fl. Illustr. Catar. 1 (Isoetaceae): 17 (1986) Isoetes spannagelii H.P.Fuchs; Fl. Illustr. Catar. 1 (Isoetaceae): 33 (1986) Isoetes spinulospora Jermy & Schelpe; Contr. Bolus Herb. 10: 151 (1982) Isoetes stellenbossiensis A.V. Duthie; Trans. R. Soc. S. Afr. 17: 328 (1929) Isoetes stevensii J. R. Croft; Blumea 26 (1980) 177-190 Isoetes steyermarkii H. P. Fuchs Isoetes storkii T.C. Palmer; American Fern Journal 22(4): 136 (1932) Isoetes taiwanensis De Vol; Taiwania 17(1): 1-7, f. 1 (1972) Isoetes tegetiformans P. M. Rury; Amer. Fern J. 68(4): 100 (1978) Trivial names: Mat-forming Merlin's-grass Isoetes tenuifolia Jermy; J. Hall, Bot. J. Linn. Soc. 64: 118 (1971) Isoetes transvaalensis Jermy & Schelpe; Contr. Bolus Herb. 10: 150 (1982) Isoetes triangula U. Weber; Hedwigia 63: 253, f. 32, 33 (1922) Isoetes tripus A. Br.; Herb. Vindob. & Hook (1863) Isoetes tuckermanii A. Braun ex Engelm.; A. Gray, Manual ed. 5: 676 (1867) Trivial names: Tuckerman's Quillwort Isoetes tuerckheimii Brause; Urban, Symb. Antillianae 7: 161 (1912) Isoetes ulei Weber; Hedwigia 63: 255, fig. 40-41 (1922) Isoetes velata A. Braun; Bory & Durieu; Expl. Sci. Algèrie, Atlas: tab. fig. 1 (1849) ssp. velata A. Braun; Bory & Durieu; Expl. Sci. Algèrie, Atlas: tab. fig. 1 (1849) f. baetica (Willk.) Prada; Acta Bot. Malac. 8: 88 (1983) f. lereschii (Rchb.f. ex Leresche & Levier) Prada; Lazaroa 3: 33 (1981 publ. 1982) ssp. adspersa (A. Braun) Batt. & Trabut; Fl. Algèrie Tunisie: 407 (1905) ssp. asturicensis (Lainz) Rivas Martinez & Prada; Lazaroa 2: 327 (1980) ssp. dubia (Genn.) Batt. & Trabut; Fl. Syn. 407 (1902) ssp. intermedia (Trabut) Maire & Weiller; Maire, Fl. Afrique. N. 1: 89 (1952) ssp. longissima (Bory) Greuter & Burdet; Willdenowia 14(1): 37 (1984) ssp. perralderiana (Milde) Batt. & Trabut; Fl. Algerie Tunisie: 407 (1905) ssp. tegulensis Batt. & Trabut; Fl. Algerie Tunisie: 407 (1861) ssp. tenuissima (Boreau) O. Bolós & Vigo; Butll. Inst. Catalana Hist. Nat. 38: 64 (1974) Isoetes vermiculata Hickey; Ann. Missouri Bot. Gard. 76(4): 1160 (1989) Isoetes virginica Pfeiffer; Claytonia 3: 29 (1937) Trivial names: Virginia Quillwort Isoetes weberi Herter ex Weber; Hedwigia 63: 255-256, fig. 44-45 (1922) Isoetes welwitschii A. Braun ex Kuhn; Filices Africanae 196 (1868) Isoetes wormaldii R. Sim; Trans. S. Afr. Phil. Soc. 16: 299, t. 5 (1906) Isoetes x altonharvillii Musselman & R.D.Bray; Castanea 60(3): 246 (1995) Remarks: Isoetes caroliniana x engelmannii Isoetes x brittonii D.F. Brunt. & W.C. Taylor; American Fern Journal 80: 82-89 (1990) Remarks: Isoetes engelmanii x Isoetes riparia Isoetes x bruntonii Knepper & Musselman; Amer. Fern J. 86(1): 9 (1996) Remarks: Isoetes engelmannii x hyemalis Isoetes x carltaylori Musselman Isoetes x dodgei A.A. Eaton Remarks: Isoetes echinospora x Isoetes riparia Isoetes x eatonii Dodge; Botanical Gazette 23: 16, t. 4-5 (1897), pro sp. Remarks: Isoetes echinospora x Isoetes engelmannii Isoetes x fairbrothersii J.D.Montgom. & W.C.Taylor; Amer. Fern J. 84(4): 120 (1994) Remarks: Isoetes engelmannii x lacustris Isoetes x foveolata A.A. Eaton ex Dodge; Ferns & Fern Allies of New England 38 (1896) Remarks: Isoetes engelmannii x Isoetes tuckermanii Isoetes x harveyi A.A. Eaton Remarks: Isoetes lacustris x Isoetes tuckermanii Isoetes x hickeyi W.C.Taylor & Luebke; Amer. Fern J. 78(1): 6 (1988) Remarks: Isoetes echinospora x Isoetes lacustris Isoetes x jeffreyi D.M. Britton & Brunton; Canadian Journal of Botany 70: 447-452 (1992) Remarks: Isoetes lacustris x Isoetes riparia, Isoetes macrospora x riparia Isoetes x marensis D.M.Britton & D.F.Brunton; Canad. J. Bot. 73(9): 1352 (1995) Remarks: Isoetes howellii x maritima Isoetes x michinokuana M. Takamiya & al. Isoetes x pseudotruncata D.M.Britton & D.F.Brunton; Canad. J. Bot. 74(1): 58 (1996) Remarks: Isoetes echinospora x maritima Isoetes x truncata (A.A. Eaton) Clute; The Fern Allies 260 (1905) Trivial names: Vancouver Quillwort Remarks: Isoetes maritima x Isoetes occidentalis
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For each species, information on its distribution by country and sometimes by province, region or state within a country; conservation status (where applicable), and all synonyms with publishing source (other latin names by which the species has been known) that we could find, and where applicable whether or not the given name has been verified; are available on the CDROM version of this page.

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