W ATSON—Plants of Bernalillo County 
Asp.) A small slim tree 20 to 50 feet high but seldom 
over a foot thick, with smooth greenish-white bark; 
leaves roundish-cordate, with a sharp point and small 
somewhat regular teeth, smooth on both sides, with 
downy margins on very slender petioles which cause 
them to vibrate in the wind. In the narrow Canons 
and on North facing steep slopes high up in the San- 
dia Mts., where it forms dense groves. Very conspic- 
uous in October when the leaves are a bright yellow. 
New Mexico and Texas is its southern limit from 
whence it ranges to the Arctic Ocean. 
P. ancustiroLia, James. (Narrow-leaved Poplar. 
Willow-like Poplar. Branches glabrous, leaves alter- 
nate at base, glabrous, acute, crenate-serrate. A large 
tree of the lower part of Bear Canon, often called 
“Willow.” ‘Also grows below Camp Whitcomb and in 
other Canons. 
638. PIPERACEAE. Pepper Family. 
Herbs with pointed stems, alternate entire leaves 
and perfect, spicate flowers. 
Hovurtuynia, Thunb. 
Perennial herb, spreading by stolons, with thick pun- 
gent root; thick leaves with transparent dots; the white 
flowers crowded in a conical head, (the white part is a 
bract not a sepal), 6 to 8 stamens. 
H. Catrrornica, B. and H. Stem erect, 2 to 6 in. 
or more high with a single broad clasping leaf in the 
center, and an axillary branchlet reduced to one or 
more slender-petioled leaves; radical leaves oblong- 
oval, cordate at base, 1 to 6 in. long, glabrous. Exceed- 
ingly common in alkili soil in the valley where it often 
forms a turf. 
MONOCOTYLEDONS. 
64. ORCHIDEAE. (Orcuis Famity.) 
Perennials herbs; leaves alternate; flowers perfect 
and irregular, 6-parted perianth united below with the 
1-celled ovary, the 3 sepals and 2 of the petals similar 
but the third (lip) differing from the others, 1 to 2 
stamens borne on the pistil, with pollen waxy and co- 
hering in masses; very numerous and minute seeds. ' 
Whitish or yellowish, leaves reduced to scales, 
: - - - CoRALLORHIZA. 
With green leaves, - - - GoopyYERA. 
Corattoruiza, Haller. (Coral-root. ) 
The solitary scape has 2 to 4 membranaceous sheaths 
(90) 
