1913] NELSON—ROCKY MOUNTAIN PLANTS 67 
Azaleastrum Warrenii, n. sp.—A low stoutish shrub, with gray- 
ish bark, the youngest twigs brown or greenish-brown: leaves in 
terminal fascicles of 3-5, ovate, oval, or obovate, from broadly 
rounded at apex to subacute, thin, green on both sides, glabrate 
(even when young), closely studded on the margin with minute 
gland-tipped hairs, the blade 1-2 cm. long and tapering to the 
short margined petiole-like base: the leaf bud scales (stipules?) 
oblong-lanceolate, hirsute with reddish-brown hairs: flower buds 
with similar reddish-brown hairs but these very few and scattering 
on the oval brown deciduous scales, on the short stoutish glandular 
peduncle, and on the backs of the sepals: flowers lateral on the 
young twigs, solitary or few at the approximated nodes: sepals 
narrowly obovate-elliptic, same texture and color as the leaves, 
7-10 mm. long, obtuse or obtusish, closely beaded on the margin 
and back with short gland-tipped hairs: corolla campanulate- 
rotate, to-15 mm. long and broad; its lobes suborbicular, about 
as long as the tube: stamens 10 ; the cells opening by terminal 
Pores; the stoutish filaments shorter than the corolla, softly pubes- 
cent below the middle only: pistil stoutish, obscurely pubescent 
near the base, enlarging upward to the peltate-capitate stigma, the 
five lobes of which are encircled by a ringlike border: ovary 
Covered with the gland-tipped hairs characterizing the plant: fruit 
wanting, but the ovules very numerous on the columellar placenta. 
This very interesting Rhododendron ally was secured by Mr. Epwarp R. 
Warren, of Colorado Springs, so well known for his “‘ Mammals of Colorado,” 
July 14, 1911 , in Jackson County, Colorade. The material was exceedingly 
meager, but the request for full notes brought a very interesting letter, from 
which the following paragraph is quoted: 
“What you say about my no. 16 is very interesting. I found it at my 
camp on the lower slope of Mt. Zirkel, at the head of navigation for prairie 
schooners on the ‘Ute Pass Trail.’ If I remember correctly, it was quite 
abundant. It was a low plant, perhaps not more than a foot high. It was 
gtowing on a slope which was free from growing green timber, with many 
fallen dead logs, and some standing dead stubs. Soil was gravelly. I made 
the altitude 9,275 feet, and my altitudes checked very well last summer. 
There were a few scattering aspens growing about. I may possibly be mistaken 
as to its being a low plant, I made no special notes, but it was a different 
8rowing plant from the Ceanothus which grew in the region, and not as conspicu- 
us a shrub. I evidently did not collect much of it, for I have but a single 
