61 
+ + Branches mostly spinose: flowers in simple racemes : leaves rather small, somewhat 
coriaceous and entire. 
3. C. Fendleri Gray. Silky pubescent: leaves narrowly oblong to elliptic, 8 to 
24 mm. long, usually small, somewhat narrowed and cuneate at base, obtuse or acute 
above: flowers in short terminal racemes.—¢ A very thorny and spreading bush in 
foothills beyond the Pecos ” (Havard), 
** Leaves mostly opposite, L-ribbed, with numerous straight parallel veins, very thick and 
coriaceous, entire or spinosely-toothed : Jlowers in sessile or short-pedunculate axillary 
clusters : fruit with 83 horn-like or warty prominences below the summit. 
4. C. Greggii Gray. Erect, 15 dm. high, tomentose: leaves obovate or oblong, 
rounded or retuse above, on rather slender petioles, entire or very rarely few-toothed : 
flowers white or occasionally blue, in rather loose clusters.—In the mountains west 
of the Pecos, 
9. COLUBRINA Richard. 
Shrubs or trees with rigidly divaricate but scarcely spinose branches, 
alternate more or less 3-nerved leaves, and tomentose flowers in axillary 
umbel-like clusters. 
1, C. Texensis Gray. Shrub as much as 45 dm. high: leaves usually less than 
2.5 em. long, pubescent or at length glabrate, elliptical to spatulate-obovate, glandu- 
- 
lar denticulate: fruit 8 mm. in diameter, short-beaked by the persistent style, on 
recurved pedicels.—From the Colorado to the Rio Grande and west to New Mexico. 
10. ADOLPHIA Meisn. 
Small-leaved or nearly leafless shrubs, with opposite divaricate green 
branches articulated with the stem and ending in spines, and small 
flowers in sparse axillary clusters. 
1. A. infesta Meisn. Mostly puberulent or villous, with often reflexed short hairs: 
leaves short-petioled, 2 to 10 mm. long, 1-nerved, sublanceolate, entire or low serrate: 
fruit subglobose, crowned with a beak 1 mm. long, formed by the persistent base of 
the style.—In the mountains west of the Pecos, and apparently very abundant along 
the Limpia. Dr. Havard speaks of it as a “ horridly spinose ” plant. ’ 
AMPELIDACER. (VINE FamIny. ) 
Shrubs usually climbing by tendrils, with alternate palmately veined 
or compound leaves, tendrils and clusters of small greenish flowers 
opposite the leaves, a minute or truncated calyx, 4 or 5 very deciduous 
valvate petals, stamens as many and opposite them, and a 2-celled 
usually 4-seeded berry. 
* Ovary surrounded by a nectariferous or glanduliferous disk: plants climbing by 
the coiling of naked-tipped tendrils. 
1, Vitis. Corolla caducous without expanding: hypogynous glands 5, alternate 
with the stamens: fruit pulpy: leaves simple. 
2. Cissus. Corolla expanding: disk cupular: berry with scanty pulp, inedible: 
leaves simple or pinnately compound. 
**No distinct hypogynous disk: plants climbing by the adhesion of the dilated tips 
of the tendril-branches. 
3. Ampelopsis. Corolla expanding: leaves digitate, 
