10 Contributions from the Gray Herbarium 
sessile bracts of A. trinervata but they are united to above the 
middle and the leaves are entire as in true A. expansa. This form 
is most common in southern California but extends north where it 
meets the range of A. trinervata. Since these variations merge with 
and largely but not entirely replace A. expansa in California the 
are best treated as varieties of the latter. 
ATRIPLEX CORONATA Wats. The meager but well-fruited co-type 
material in the Gray Herbarium of A. sordida Standley, N. A. Fl. 
xxi. 47 (1916) does not suggest that it is specifically distinct from 
Watson’s plant. 
ATRIPLEX MURICATA Humb. & Bonpl. A. glomerata Wats. ex 
Standley, 1. c. 54, is not to be distinguished. It represents the form 
with reduced tubercles on the bracts, or these even obsolete, & 
variation occurring in many other species. A. pueblensis Standley, 
1. c. 56 is related to A. muricata but is apparently quite distinct by 
reason of the spicate staminate inflorescence. Standley describes 
the leaves as entire. Our specimen, a co-type and labeled by 
Standley as representing his species has some of the upper leaves 
distinctly denticulate. 
_ATRIPLEX OBOVATA Mogq. Chenop. Enum. 61 (1840 
xi. pt. 2, 99 (1849). A. Greggii Wats. Proc. Am 
(1874). A. sabulosa Jones, Contrib. W. Bot. xi. 21 (1903). A- 
Jonesti Standley, N. A. Fl. xxi. 65 (1916). 
Standley, 1. ¢., distinguishes A. Jonesii from A. obovata by the 
“usually smooth bracts,’’ the latter species (according to Standley) 
having the sides of the bracts “sparsely tuberculate or crested near 
the base or rarely smooth.” In as much as most species exhibit 
this sort of variation, viz. in having the bracts either quite smooth 
or more or less tuberculate, one is not greatly impressed by the 
Strength of A. Jonesii as a species. Furthermore A. obovata was 
originally described as having smooth bracts! As a matter of fact 
the species may have quite smooth and sparsely tubercled bracts 
on the same plant as is shown by a specimen from El Sauz, Arizona 
(Hayes) and also by one from Sonora, Mexico (Thurber). Standley 
has labeled the former as representing A. Jonesii and the latter a5 
A. obovata although each shows approximately the same number of 
tubercled bracts. There is, however, a Texan specimen of this 
species collected by Havard the bracts of which are so copiously 
covered with elongate tubercles that it was determined as “ A. 
DC. Prod. 
ie ix tie 





