1904] GOODDING: SOUTHWESTERN PLANTS 57 
are clothed with a thick, light brown, woolly pubescence): leaves 
20-25°™ long; rachis terete or often angled, with a narrow dorsal 
canescent line; leaflets g-15, glabrous and green above and below, 
oblong-lanceolate, acuminate, acutely serrate, sessile: .fruiting 
thyrse “15-25°™ long, open and quite strongly recurved; the 
rachis and its branches clothed with a rather coarse persistent 
pubescence; its branches often 8™ long, ascending, subtended in 
the young thyrse by linear bracts 5-20™" long: drupe slightly 
laterally compressed, about 3™™ in diameter, clothed with short, 
light red pubescence: stone nearly globular and smooth. 
R. macrothyrsa is most closely related to R. glabra, from which it can 
readily be distinguished by its dark green leaves which are not at all glaucous 
on either side, and its long open recurved thyrse. 
Collected by the writer (no. 988) at Calientes, Nevada. 
- Rhus utahensis, n. sp.—Shrub 1-1.5™ high, diffuse, rather 
slender: leaves simple, suborbicular or subreniform, truncate at 
base, coarsely and somewhat evenly crenate, 1.3-2™ long: peti- 
oles terete, minutely pubescent, 4-8™™ long: inflorescence few- 
flowered: drupes rather large, 5-8 ™™ in diameter, clothed with a 
short pubescence. 
R. utahensis is apparently the 2. canadensis simplicifolia Greene, which 
name is untenable, however, on account of RX, simp/licifolia Salisb. 2. utah- 
ensis is well worthy of specific rank, as it is very distinct from R. ¢rilobata, 
its nearest ally. 
Collected by the writer (no. 832) in Diamond Valley, Utah. 
“ Apocynum nevadense, n. sp.—Glabrous throughout, stem 
I175™ high, sreery branched above, the paired lateral branches 
far surpassing the central stem: leaves very smooth, subglaucous 
below, slightly darker above: the cauline sessile, semiclasping 
at base, s—12™ long, 2.5—4.5°™ wide, perfectly oblong, decidedly 
obtuse but tipped with a minute cusp, cordate at base; the 
rameal elliptic, acute, strongly murcronate, tapering below to the 
short petiole: cymes 1-3, usually terminal on the main stem, 
occasionally on the branches: peduncles 1-3™ long; pedicels 
subtended by linear acute bracts: calyx segments linear-lanceo- 
late: corolla white, cylindrical, exceeding the calyx segments 
by one-half: fruit gQ-11°™ long. 
This plant is probably most closely related to 4. oblongum Greene, but 
