WOOTON AND STANDLEY—NEW PLANTS FROM NEW mexico. 175 
1896, Palmer 131, 507; Saltillo, 1898, Palmer 193; near San Juan Capistrano, 
Zacatecas, 1897, Rose 2495. 
The plant occurs as far north as western Texas and southern Arizona. In 
New Mexico it is known only from the Dona Ana Mountains, where it was col- 
lected October 28, 1896, by Wooton & Standley. 
This has always passed as S. stans (Tecoma stans L.), but is distinguished 
by its low stature, narrow leaflets with sharp and salient teeth, and the narrower 
and longer bractlets. The leaflets, too, are usually more numerous than in 
g. stans, The latter is a shrub often 3 meters high or more, or even a low tree 
with well-defined trunk. The proposed species is hever more than a very small 
shrub, often not more than 60 cm. high. It grows in the driest places in the 
southwestern mountains, on exposed slopes among rocks. 
RUBIACEAE. 
Houstonia rigidiuscula (A. Gray) Wooton & Standley. 
Houstonia angustifolia rigidiuscula A. Gray, Syn. Fl. 17: 27. 1884. 
Readily. distinguished from H. angustifolia by the lower, stouter, less erect 
stems, the thick, rigid leaves, and the few, more closely glomerate flowers. A 
common plant of western Texas and eastern New Mexico, growing on the plains 
and low hills of the Upper Sonoran Zone. 
CAPRIFOLIACEAE. 
Sambucus vestita Wooton & Standley, sp. nov. 
Shrub 3 meters high or less, with numerous stout stems from a single root; 
young branches minutely and densely velvety-pubescent ; leaflets lanceolate or 
narrowly so, 8 to 15 cm. long, long-attenuate, very unequal at the base and usu- 
ally rounded, puberulent beneath, puberulent above along the veins, thin, rather 
pale green, coarsely serrate, the teeth not incurved, acute, or acutish; petioles 
and petiolules densely and finely pubescent; cyme broad (10 to 20 cm.), flat- 
topped, with numerous open, slender, pubescent branches; flowers small, 3 to 
4 wm. in diameter; fruit abundant, 5 mm, in diameter, black, glaucous, 
Type in the U. 8. National Herbarium, no. 560944, collected by Paul Cc. Stand- 
ley in Ice Canyon above Van Pattens Camp in the Organ Mountains, June 
11, 1906., 
ADDITIONAL SPECIMENS EXAMINED: West Fork of the Gila, alt. 2,250 meters, 
1903, Metcalfe 344; 4 miles west of Kingston, 1909, Goldman 1822; Eagle Peak, 
August 2, 1900, Wooton; San Mateo Peak, alt. 3,000 meters, 1909, Goldman 1740; 
Black Range, alt. 2,550 meters, 1904, Metcalfe 1184: Organ Mountains, 1908, 
Bailey 1469, May 15, 1892, Wooton, 
The plant is common in the canyons of the southwestern mountains. It is 
related to S. ncomexicana, but has smaller flowers and pubescent instead of 
glabrous branches. In habit the two are dissimilar, for S. neomezicana has 
usually a well-developed trunk with branches, while S. vestita consists of a 
clump of mostly simple shoots. 
CICHORIACEAE. 
Crepis chamaephylla Wooton & Standley, sp. nov. 
Perennial from a thick, fleshy root; stems glabrous, glaucous, 80 em. high, 
erect or ascending, very slender, the branches ascending, nearly naked, bearing 
only a few small, linear, bract-like leaves; basal leaves oblanceolate, entire, 
acute, 9 cm. long or less, glabrous, glaucous especially beneath, thick and succu- 
