VOL. I. | Fern Allies. “99 
of this species are strikingly like those of 7. echinospora Dur., but the 
upright habit, bast-bundles, and the characters of the sporangium are 
sufficient to distinguish it from even that variable species. In ap- 
pearance it is not unlike Z Mexicana, with which indeed Mr. Pringle 
confused it in the field; its spore characters, however, readily distin- 
guish it from that species. 
ISOETES MARITIMA Underw. Bot. Gazette, xiii, 94 (1888). Ina 
salt marsh, Alberni, Vancouver, 1887 (Macoun). 
IsorTEs NuttTatii A. Br. Oregon, 1871 (E. Hall); Southwest 
Oregon, 1884 (T. Howell); Nanaimo, Vancouver, 1887 (Macoun). 
Dr. Engelmann reported it also from Washington and Idaho. It 
should occur in Northern California and doubtless will be found as 
soon as some one looks for it. 
ISOETES Some dry leafless plants were communicated by 
C. R. Orcutt in 1888, which we are unable to locate with certainty; 
the microspores are dark-brown, 0.025 mm. thick, slightly muricate; 
trunk showing a tendency to be three-lobed. Mesas, South Chollas, 
San Diego, California, 1884 (Orcutt, No. 1242). 
So far British Columbia has four species of /soefes, the three Pacific 
states have each three species, and Mexico, from which no species 
were known prior to 1887, has now two. 
MarsILia vEsTITA Hook & Grev.* Mexico: San Luis Potosi, 
1881 (Schaffner); with the two plants of JZ vestita forming this spec- 
imen occurs a third plant larger and sterile, with elongate, upright 
petioles, which may possibly belong to JZ. polycarpa; Slaven’s Ranch, 
Sonora (Lemmon); San Jorge, Baja California, 1889 (Brandegee) 
mixed with AZ. Mexicana; Sierra de la Laguna, 1890 (Brandegee). 
Arizona: Sterile aquatic forms (Lemmon). California: Sierra Co. 
1874 (Lemmon); Emigrant Gap (Brandegee); San Diego, 1884 (Or- 
cutt); Del Mar, San Diego Co., 1889 (Brandegee) mucronata form. 
Webber Lake, 1887 (Mr. & Mrs. J.G. Lemmon). Oregon: Grant's, 
Columbia R. (T. J. Howell); also specimens cultivated by Al. Braun 
in Berlin from material sent by E. Hall. Washington: Falcon Val- 
ey (Suksdorf). British Columbia: Kamloops, 1889 (Macoun). T his 
variable species has also a range from Dakota to Texas and west- 
ward. It is especially desirable that the aquatic forms should be 
*Other stations of this species from the specimens represented in the Gray herba- 
rium and the Torrey herbarium are noted in Bull. Torrey Club, xiv, 92 (1887). 
