124 



[Vol. 9 



GARDEN 



Bot. Gard, Herb.) ; Whangape Lake, January, 1879, Cheese- 

 man (Gray Herb.). 



19. I. Gunnii A. Br. in Herb. Hooker. I860; A. Br. Mo- 

 natsber. K. Akad. Wiss. Berlin, 535. 1868; Baker, Fern Allies, 

 124. 1887, and Jour. Bot. 18: 06. 1880; Motel. & Vendr. Actes 

 Soc. Linn. Bord. 36: 347. 1883. 



Isoetcs sp. Hooker, Fl. Tasm. 2: 158. 1860. 



/. lacustris (L.) Rodway, Tasm. Fl. 279. 1903. 



Calamaria Gunnii Kuntze, Rev. Gen. PI. 2: 828. 1891-93. 



Corm 3-lobed; leaves 30-50, 3-13 cm. long, stout, tough, ab- 

 ruptly-pointed at tip, with wide membranaceous border at base, 

 continued upward 4-6 times the length of sporangium; stomata 

 and, peripheral strands none; ligule short, with cordate base; 

 sporangium oblong, 3-6 mm. long, marked with brown cells, with 

 velum lacking; megaspores ashy or light brown when dry, dark 

 shining brown when wet, 600-800 \i in diameter, marked with 

 small distant tubercles, rarely elongated in one diameter, or 



somewhat ridge-like; microspores brown, 29-36 p long, chiefly 

 spinulose. 



Distribution: Tasmania, mountain lakes. 

 Specimens examined: 



Tasmania: Lab' Fenton, Alt. Field, ;*,009 ft. alt., 1869, v. 



Mueller (N. Y. Bot. Gard. Herb.) ; Mt. Field, Rodway (Mo. 

 Bot. Gard. Herb.); Hartz Mts., 1018, Rodway (Mo. Bot. 

 Gard. Herb.); Hobart, 1918, Rodway (Mo. Bot. Gard. 



Herb.). 



the unner half of 



appears a dark green, the base brown, in herbarium specimens 

 The bulb formed by the sporangia is apt to be 3-4 cm. in di- 

 ameter. According to F. v. Mueller, the leaves are rigid enough sc 

 that the term "water-porcupine" seemed fitting for plants grow- 



& 



in Lake Fenton on Mt. Field. He reported corms as larg 

 one's fist, and a habit of growth in groups that resulted i 

 polster. 



All of the material examined at Mo. Bot. Gard. in 1918 

 obtained through the courtesy of L. Rodway of Hobart, Tasma 

 who is presumably the collector. 



