56 BOTANICAL GAZETTE [JANUARY 
lar in size and outline but usually long clawed: akenes normally 
two (rarely three), large, 8™™ long and 2™ wide, with a prominent 
keel along the back; length of the tails unknown. 
This elegant species cannot be said to be closely related to any other. 
The number and size of the akenes and the shape of the leaves:are very 
characteristic. 
Collected by the writer in the mountains south of Bunkerville, Nevada 
(no. 744). 
y Geranium longipes (Wats.).—Annual: stems usually simple 
below, branched above, one to several from the same root, 
sparingly strigose with short reflexed hairs; above, at the second 
or third whorl of leaves, the stem breaks up into three to six 
equal slender branches which in turn branch out into the two- 
flowered, much elongated, nearly filiform peduncles: pedicels 
slender and elongated; peduncles and pedicels quite densely 
glandular-pubescent: leaves broadly reniform in outline, 3-5™ 
wide, deeply 5—7-cleft nearly to the base, the divisions narrowly 
lobed; radical leaves numerous, on slender petioles, 10-15™ 
long: flowers white or pinkish, 2.5—3°™ in diameter: sepals nar- 
rowly oblong, ciliate, pubescent on the prominent veins, terminat- 
ing in a long awn: petalsa little shorter than the sepals, narrowly 
obcordate, deeply triangulate-notched: lobes of the ovary coarsely 
strigose-pubescent ; filaments persistent, as long as the lobes of the 
ovary; beak 2° long, rather long-pointed: seeds oblong, pitted. 
It is apparent from the meager description of G. carolinianum longipes 
Wats. that it must have been drawn from inadequate material. The “usually 
solitary peduncle” of Mr. Watson’s description is true of occasional western 
plants, but these can by no means be separated from the other western forms. 
All the western material I have seen (except one specimen of true G. cavoli- 
nianum from Idaho, which was doubtless an introduction) has the elongated 
peduncles and pedicels, and this has led me to think that all our western 
material comes under Dr. Watson's G. carolinianum longi~es. The charac- 
ter of the pubescence as well as the elongated peduncles and pedicels, 
together with such minor points as the narrower calyx lobes, longer point on 
the beak, etc., easily separate the western plant from the eastern. 
The writer's no. 1395 from the Uintah Mountains, Utah, is considered 
typical. 
v Rhus macrothyrsa, n. sp.—A tree-like shrub 1.5~2.5™ high, 
with glabrous stems (except the base of the young shoots which 
