1922] 



PFEIFFER — MONOGRAPH OF THE ISOETACEAE 143 



with vague short crests, tubercles, like species; microspores 23- 

 30 [i, rarely 33 u, in length, almost smooth to spinulose. 

 Distribution: Washington, California, Lower California. 



Specimens examined: 



Washington : in a slow shallow stream, Falcon Valley, 6 Septem- 

 ber, 1886, Suksdorj 2371 (Mo. Bot. Gard. Herb.); damp 

 places on prairies near Waverley, Spokane Co., 16 May, 1889, 

 Suksdorj 2365, 2366 (Mo. Bot. Gard. Herb.) ; on wet ground 

 near Spangle, Spokane Co., May, 1889, Suksdorj 2367 (Mo. 

 Bot. Gard. Herb.). 



California: San Diego, May, 1903, Orcutt (Mo. Bot. Gard. Herb. 



not U. S. Nat. Herb., same date and place). 



Lower California: Sierra de la Laguna, 23 January, 1890, Bran- 



degee 674 (Gray Herb.). 

 The form differs from the type species in its smaller size, not 



only in leaf length and thickness, but also in megaspores and 



microspores. 



A. A. Eaton founded his species /. minima on a 3-lobed speci- 

 men of this form. Since most of the material cited proves to 

 be 2-lobed, it is supposed that the occurrence of 3 lobes is like 

 the chance development reported occasionally in other regularly 



2-lobed species. 



35. I. Bolanderi Engelm. Am. Nat. 8: 214. 1874; Baker, 

 Jour. Bot. 18: 08. 1880; Motel. & Vendr. Actes Soc. Linn. Bord. 

 36 : 338. 1883 ; Engelm. in Brewer & Watson, Bot. Cal. 2 : 350. 

 1880; Coulter, Bot. Rocky Mts. 435. 1885; Engelm. Trans. St. 

 Louis Acad. Sci. 4: 381. 1881; Macoun, Cat. Canad. PL pt. 

 4: 293. 1888; Piper, Contr. U. S. Nat. Herb. 9: 89. 1906; Coul- 

 ter & Nelson, Bot. Rocky Mts. 



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



/. calijoniica Engelm. in Gray, Manual, ed. 5, 677. 1867. 



/. Bolanderi var. Parryi Engelm. Am. Nat. 8: 211. 1874. 



/. Bolanderi Sonnei Hend. Bull. Torr. Bot; Club 27 : 349. 1900. 



Corm deeply 2-lobed; leaves 6-25, 6-13 cm. long, rarely 25 

 cm., slender, tapering to a very fine point, bright green, soft; 

 stomata not numerous; peripheral strands usually lacking; ligule 

 small, cordate; sporangia 3-4 mm. long, about 1/4-1/3 covered 

 by velum ; megaspores white, sometimes bluish, 300-440 u, rarely 



