546 MACBRIDE. 
Greeneocharis dichotoma (Greene), comb. nov.— Krynitzkia 
dichotoma Greene, Bull. Calif. Acad.i. 206 (1885). The original collec- 
tion from western Nevada is the only representation of this species at 
the Gray Herbarium; other specimens so referred belong rather to 
the widely distributed and somewhat variable G. cirewmscissa (H. & A.) 
Rydb. The latter is canescent with a more or less appressed-strigose 
pubescence, especially on the stems and branches. A plant with fine 
widely spreading hairs and scarcely, if at all, strigose-canescent has 
been collected at an elevation of 3050 m., while the typical form seldom 
attains half this altitude. This high-mountain variation may be 
known as 
GREENEOCHARIS crrcumcIssa (H. & A.) Rydb., var. hispida, var. 
nov., hispida vix strigoso-canescens; pilis patentibus.— Specimen 
examined: CALIFoRNIA: trail to Mt. Whitney, August 13, 1904, 
Culbertson, no. 4243 (ryPE, in Gray Herb.). 
Plagiobothrys catalinensis (Gray), comb. nov.— P. arizonicus 
(Gray) Greene, var. catalinensis Gray, Syn. FI. ii. pt. 1,431 (1886). Be- 
sides differing from P. arizonicus in the open fruiting-calyx with ovate 
lobes and the duller rougher nutlets (as pointed out by Dr. Gray, 
l.c.), P. catalinensis has other distinguishing features. Mature nutlets 
are only 1.5 mm. long, dark in color, the rugae obscure and not at all 
acute, the ventral keel low and narrow, and the caruncle small. 
Mature nutlets of the former plant are nearly or quite 2.5 mm. long, 
light (almost white) in color, the rugae very distinct and acute, and 
the ventral keel and caruncle usually prominent. Moreover the 
spikes of the mainland plant are usually interruptedly bracteate or 
even naked above; the spikes of the insular species are uniformly 
bracteate throughout. 
OrrocaryA vircata (Porter) Greene, forma spicata (Rydb-.), 
comb. nov.— 0. spicata Rydb. Bull. Torr. Bot. Club, xxxvi. 678 (1909). 
Although the surface-character of the nutlets is generally diagnostic 
in this genus, the smooth-fruited plant represented by the above 
name is surely not worthy even varietal rank, let alone specific. 
The nutlets of O. virgata vary greatly in the degree of roughness; 
and plants with more or less roughened fruits and those with per- 
fectly smooth fruits that grow together in the region of Pike’s Peak 
are otherwise indistinguishable. 
OREOCARYA MULTICAULIS (Torr.) Greene, var. cinerea (Greene), 
comb. nov.— 0. cinerea Greene, Pitt. iii. 113 (1896). The only 
character that distinguishes this is the pubescence. As in the typical 
form the color of the nutlets and the height of the stems amount to 
