14 Muhlenbergia, Volume 9 
2mm. long, teeth 3.5mm., villous: vexillum 9 mm. long, 5 mm. 
wide: ovary 2-ovuled: style 6mm. long: legume glabrous, one- 
seeded, membranaceous, faintly striate, elliptical, 3 mm. long: 
‘seeds brown, 2.3 mm. long, elliptical, without markings. 
This species differs from azchotomum in having a very con- 
spicuous purple corolla tipped with white. The florets are con- 
spicuous from the beginning, in which they are unlike any other 
species of the group. The type collection of var. surbinatum 
Jepson, Ross valley, Jepson, May 8, 1894, which is a small and 
young californicum shows this character very strikingly. The 
heads are at first turbinate and later become elliptical or coni- 
cal. In the original description in Flora of Middle Western 
California, where it is called 7: azchotomum, the statement calyx 
teeth “nearly or quite as long as the corolla” is very misleading, 
as the plants all have the coro‘la considerably longer than the 
teeth, both when young and old. Specimens considered typi- 
cal, from Conn valley, Napa river basin, Jepson, have the cor- 
rolla considerably longer than the calyx teeth. 
It seems to be confined to the hills along the Coast Range, 
growing in patches in both cultivated and uncultivated areas. 
The following sheets represent the different forms of growth 
from small plants with few branches to large plants profusely 
branched from the base: 
‘Santa Clara county: Mt. Hamilton, Elmer 2202, 4931; Los 
Gatos, Kennedy, May, 1907, Heller 7423. 
Sonoma county: Near Mark West Springs, Afedler and 
Brown § 290. 
Marin county: Ross valley, Wichener and Biolettt 20. 
TRIFOLIUM MACRAEI HH. & A. (Plate 5.) 
1. bicephalum Elmer 
A low pubescent annual, simple or branched from the base 
with decumbent spreading or suberect stems, and usually a pair 
of sessile or subsessile heads subtended by short petioled leaves 
and one or more very broad stipules. The type plants were col- 
lected by Macrae at the Baths of Collina, Chili, in 1825. Other 
collections are, sandy hills, Valparaiso, Mathews 774; Valpa- 
