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MACKENZIE: NotTEs ON CAREX 605 
perigynia, which are completely concealed ; perigynia ascending, 
brownish at maturity, plano-convex, broadly ovate, 1.8 mm. long, 
1.4 mm. wide, broadly rounded at base, abruptly narrowed into a 
minute bidentate beak about 0.25 mm. long, hardly spongy at 
base, nerveless or nearly so, not margined, but the upper part of 
the body and the beak serrulate ; achenes lenticular with broadly 
elliptic face, 1 mm. long; stigmas two. 
The earliest description of Carex Gayana E. Desv. which I 
have seen (C. Gay, Fl. Chil. 6: 205) was published in 1854 ac- 
cording to the title-page of the work. However, the plates of 
this and some other species seem to have been issued in 1853 as 
Cyperaceae chilenses (Historia de Chile), and plate 73, figure 3, re- 
ferred to in the description in Gray’s work is here found. The 
specimens on which the species was based were collected in Chile, 
but Dr. Boott took up the name for a plant found in western North 
America, known to him from Fendler’s zo. 88z and Bourgeau’s 
from “ Base of the Rocky Mountains.’”’ This last-named specimen 
is figured by him (f/. gr7) as “‘ Carex Gayana Desv.,” and other 
authors who have had occasion to deal with the North American 
plant have followed him, although not without misgivings, the 
North American plant having been collected but little until recently. 
The real Carex Gayana, however, is a plant bearing much the same 
; general resemblance to the North American plant, now named by 
me Carex simulata, that Carex stenophylla Wahl. does to Carex 
marcida Boott. The differences noted may be thus contrasted : 
Culms 3.5 dm. high; heads 12-25 mm. long, linear-oblong to ovate-oblong ; scales 
cuspidate ; heads much exceeding the leaves. : simulate. 
Culms 1-2 dm. high ; heads 8-18 mm. long, ovate ; scales acuminate ; heads little 
exceeding leaves, C. Gayana. 
Of this species I have seen the following specimens : 
Wyominc: Chug Creek, Albany County, A. Welson 73 16, June 
29, 1900 (type, in Herb. N. Y. Bot. Garden); Headwaters of Clear 
Creek, 7; weedy 3336, July-August, 1900; Point of Rocks, Mer- 
rill & Wilcox 665, June 19, 1901; Clear Creek, 7. A. Williams, 
August 12, 1898. : 
Cotorapo: North Park on edge of Wyoming, Osterhout, Sep- 
tember 1, 1897; Rocky Mts. (Colorado?) Vasey 595. 
Montana: Montana Valley, Madison County, 4. & E. Nelson 
_ 6483, September 3, 1899. 
