67 
leaves pinnate, of 3 or 5 leaflets which are smoothish when old, very veiny, ovate, 
pointed, toothed: fruit smooth, with large rather incurved wings.—On streams east 
of the Pecos, 
9. GLOSSOPETALON Gray. 
Low and rigid shrubs, with slender spinescent branches, small alter- 
nate simple and entire stipulate leaves, small solitary white flowers 
terminating short axillary branches or spur-like fascicles, slender 
spreading petals, 8 or 10 stamens, and a cartilaginous 1 or 2-seeded 
follicle. 
1, G. spinescens Gray. Smooth: leaves narrowly oval, separating in age from a 
dilated scale-like minutely 2-stipulate base: flowers 5-merous: stamens 10: follicle 
ovoid, oblique, acute, many-striate, opening down the ventral suture.—Mountains 
and rocky places near El Paso, 
ANACARDIACEA. (Casnew or SumMAcH FAMILY.) 
Shrubs or trees, with alternate simple or compound exstipulate leaves, 
small regular polygamous or dicecious flowers, stamens as many or twice 
as many as the petals, and a free 1-celled 1-ovuled ovary becoming a 
dry drupaceous fruit. 
1. Pistacia. Small trees: petals none: stamens 5: leaves pinnate. 
2. Rhus. Shrubs or small trees: petals 4 to 9 (usually 5): stamens as Many or 
twice as many: leaves simple or pinnate. 
1. PISTACIA L. 
Small tree, with pinnate leaves, dicecious flowers, no petals, 5 stamens, 
and a dry somewhat compressed drupe, 
1. P. Mexicana HBK. Leaflets 5 to 10 pairs, on a somewhat winged rhachis 
oblong-obovate or cuneate, glabrate, 12 mm. long: flowers in axillary or paniculate 
spikes: fruit smooth, 4 mm, in diameter.—A small Mexican tree, with an edible nut, 
said to occur near the mouth of the Pecos. ‘ 
2. RHUS L. (SUMACH.) 
Shrubs or small trees, with simple or pinnate leaves, small flowers 
in axillary and terminal bracteate panicles or sometimes in racemes or 
spikes, 4 to 9 (usually 5) sepals and petals, stamens as many or twice 
as many, and fruit a small dry drupe. 
* Fruit symmetrical, with the styles terminal. 
+ Flowers in a terminal thyrsoid-panicle : fruit glabular, clothed with acid crimson hairs: 
stone smooth : leaves odd-pinnate. 
1. R. copallina L. (Dwar SUMACH.) Shrub 24 to 36 dm. high: branches and 
stalks downy : petioles wing-margined between the 9 to 21 oblong or ovate-lanceo- 
late (often entire) leaflets, which are oblique or unequal at base, smooth and shin- 
ing above.—A sumachof the Atlantic States, extending through eastern and southern 
Texas to the Rio Grande. Var. LEUCANTHA DC, has lanceolate leaves and white 
flowers. Var, LANCEOLATA Gray, the more common form of southern and western 
Texas, has lanceolate subfaleate often elongated very entire or subserrate leaves, 
and yellow flowers, 
