[Vol. 9 

 124 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



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

 man (Gray Herb.). 



19. I. Gunnii A. Br. in Herb. Hooker. 1866; A. Br. Mo- 

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

 124. 1887, and Jour. Bot. 18: 66. 1880; Motel. & Vendr. Actes 

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



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



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



Calamaria Gunnii Kuntze, Rev. Gen. PL 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 n long, chiefly 

 spinulose. 



Distribution: Tasmania, mountain lakes. 



Specimens examined: 



Tasmania: Lake Fenton, Mt. Field, 3000 ft. alt., 1S69, v. 

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

 Bot. Gard. Herb.); Hartz Mts., 1918, Rodway (Mo. Bot. 

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

 Herb.). 



In this short coarse plant, the upper half of the leaves usually 

 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 so 

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

 ing in Lake Fenton on Mt. Field. He reported corms as large as 

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

 polster. 



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

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

 who is presumably the collector. 



