22 Contributions from the Gray Herbarium 
are restricted to certain soils. Such a study would proably explain 
the peculiarly local character of many species and the widely inter- 
rupted ranges of others. The genus is admirably suited to this 
kind of study as species are known from many types of soils, as 
limestone, granite, shales, etc., and in many cases the range of the 
species would doubtless be found to be correlated with the occur- 
rence of certain formations. 
I have seen at least one specimen of nearly every species included. 
O. interrupta Greene, Pitt. ili. 111 (1896), and O. urticacea Woot. & 
Standl. Contrib. U.S. Nat. Herb. xvi. 166 (1913) I have not seen. 
The former is very poorly described. It may be related to O. nitida 
but is of enormous size (“‘ 1 1/2-3 feet high ”). It is said to abound 
in woods east of Wells, Nevada. The latter may be a good species 
related to O. glomerata and confined to New Mexico. Kryniztkia 
fulvocanescens Gray, var. idahoensis Jones. Contrib. W. Bot. xiil. 6 
(1910) and K. multicaulis Torr., var. setosa Jones, 1. c. 4, I have 
not been able to place. Mr. Jones stands practically alone in 
not recognizing the genus Oreocarya. This, of course, is a matter 
of personal opinion but it is not clear on what grounds he persists 
in using Krynitzkia to the displacement of the earlier and valid 
Cryptantha. Such action does not accord with his work in other 
groups. 
All specimens cited are in the Gray Herbarium except when the 
citation is followed by the abbreviation “ R. Mt. Herb.,” in which 
case I am indebted to Professor Nelson for the loan of Rocky 
Mountain Herbarium material. 
KEY TO THE —— AND VARIETIES 
and ovoid in a Fieve tl vase o ea aa ie 1. O. setosissima. 
a. Nutlets never conspicuously winged, sometimes with an 
ing lants lower, 
often tufted; inflorescence bracteate; corolla white or 
w, the tube included or exserted from the calyx, 
ihe tee sometimes enlarged in fruit 
b. Inflorescence a virgate spike-like thrysus with all but the 
uppermost floral leaves much longer than the short 
cane wutlets broadly ovate, lustrous, sparsely i 
Det eles eee es oe ccs eee 2. O. virgata. 
b. Liticesaoete gto but seldom if ever so psec and 
at least the upper floral leaves reduced to co 
tively short eae which ey if at all eiesed thi the 
cymes or racemose bran 
