1900] Fernald, — Scirpus maritimus in America 24I 
spikelets has already been noted ; and that the latter plant, as seen on 
the eastern coast, is only an extreme form of S. robustus is well known 
to students of our saltmarsh vegetation. We have, then, in America 
three strong tendencies in A. robustus, which may be summarized as 
follows : 
SCIRPUS ROBUSTUS, Pursh. Spikelets brown or ferrugineous, oval 
to oblong, 1.5 to 3 cm. long, 7 to 12 mm. thick, clustered in a subglo- 
bose terminal head, and with several elongated rays bearing one to 
several spikelets ; all much exceeded by the 2 or 3 involucral leaves ; 
achenes from obovate to suborbicular, compressed or lenticular, not 
angled on the back. — Fl. i. 56; Britton, Trans. N. Y. Acad. Sci. xi. 
8o, at least as to synonyms. S. maritimus, var. macrostachyus, Michx. 
Fl. Bor.-Am. i. 32; Gray, Man. 527. S. maritimus, in part, of American 
authors, not L. — Saltmarshes of the coast, New England to Texas and 
in alkaline regions of the interior (New YORK at Salina, C/infom ; 
New Mexico, C. Wright, no. 1962, in part, etc. ), also on the Pa- 
cific coast from WASHINGTON ( Piper, no. 1008) to CALIFORNIA (C. 
Wright, etc.). 
Var. paludosus. Spikelets brown or ferrugineous, in a dense, 
rarely compound, head, usually without elongated rays. —.5. paludo- 
sus, Aven Nelson, Bull. Torr. Bot. Cl. xxvi. 5. S. maritimus, in part, 
of American authors, not L. S. robustus, Britton in Britton & Brown, 
Ill. Fl. i. 268, as to descr. and fig. Saltmarshes, abundant on the Atlan- 
tic coast from the Gulf of St. Lawrence (?) and New England south- 
ward, in the interior at various alkaline stations (Salina, New York, 
Clinton ; SASKATCHEWAN, Bourgeau ; Cypress Hills, Macoun ; western 
DakorA, Zeiberg; Reno Co., Kansas, Hitchcock; Howell Lakes and 
Seven Mile Lakes, WvowiNc, A. Nelson, nos. 5312, 6878 ; Santa Inez 
Mountains, CALIFORNIA, Mrs. Cooper, etc.), and on the Pacific coast 
( CALIFORNIA, Hartweg, etc.). 
Var. campestris. Similar to the latter, but spikelets straw 
colored or very pale. — S. campestris, Britton in Britton & Brown, Ill. 
Fl.i.267. * Manitoba” to Kansas, Nevada, eastern California, and 
northern Mexico — (Western Kansas, Oyster; NEVADA, Humboldt 
Sink, Watson, no. 1214; ARIZONA, Gila, Zhurber, no. 687; NEw 
Mexico, Rio Laguna, Marcy Exped.; CALIFORNIA, Mojave Desert, 
Cooper, no. 2216, Parish, no. 1544 ; SONORA, Horseshoe Bend, 1889, 
Palmer, no. 931). 
GRAY HERBARIUM. 
