1911] NELSON—IDAHO PLANTS 267 
never sharply serrate on the margin but varying from entire to 
merely undulate crenate: flowers not crowded-terminal as in the 
species, but axillary-pediceled in the upper leaves and in a short 
nearly naked terminal raceme of 3 or 4 flowers: carpels hirsute- 
hispid on upper part of the back only. 
MACBRIDE 582, moist hillsides, Manyon Creek, Elmore Co., August 11, 
IgIo. 
Phaeostoma rhomboidea, n. comb.—Clarkia rhomboidea Dougl., 
Hook. Fl. Bor. Am. 1:214. 1833; Opsianthes gaurioides Lilja, 
Linnaea 15:261. 1840. 
The genus Phaeostoma was established by Spacu (Hist. Veg. Phan. 4: 392. 
1835), one species being referred to it, namely P. Douglasii, which was the 
earlier Clarkia elegans Dougl. I am not so much surprised that this excellent 
genus was later suppressed (during the Benthamian era) as I am that it has 
not been since restored. There are only a very few species referable to it, but 
these are so aberrant in the genus Clarkia that one trying to find them by 
means of keys now available meets with a number of contradictory and mis- 
leading statements. Clarkia rhomboidea runs just as readily to Godetia as to 
Clarkia, for it requires a decided mental bias to recognize the narrowed base 
of its petals as a claw. 
Removing the species with entire petals from Clarkia, it becomes homo- 
geneous in that all the species have clawed, 3-lobed petals, only 4 real stamens, 
and a stigma evidently lobed. Phaeostoma, on the other hand, has entire 
_ petals with or without claw, eight perfect subequal stamens, and a stigma with 
lobes so short that the stigma looks capitate or disciform. It is to be noted 
too that in Phaeostoma some of the leaves are opposite. The other species 
referable to this genus are as follows: 
Phaeostoma elegans, n. comb.—Clarkia elegans Dougl., Lindl. 
Bot. Reg. t. 1575. 
_ Phaeostoma xanthiana, n. comb.—Clarkia xanthiana Gray, Proc. 
Bost. Soc. Nat. Hist. 72145. 1861. 
Phaeostoma parviflora, n. comb.—Clarkia parviflora Eastwood, 
Bull. Torr. Ctub 30:492. 1903. 
Sphaerostigma implexa, n. sp.—Annual, more or less branched 
from the base and upward, 1-2 dm. high; the stems and branches 
puberulent and purplish tinged, the bark not exfoliating; the 
branches ascending, almost as long as the main axis: leaves glabrate 
or puberulent, oblanceolate to oblong-lanceolate, tapering to a 
short petiole; the lower 5-7 cm. long, upward passing into the 
