WOOTON AND STANDLEY—FLORA OF NEW MEXICO, 4138 
87. RHAMNACEAE. Buckthorn Family. 
More or less spiny shrubs 2 meters high or less, with simple leaves and small stipules; 
flowers perfect or polygamo-dicecious, mostly small and inconspicuous; calyx of 4 or 
5 valvate sepals, with a disk lining the hypanthium; petals 4 or 5 or wanting; stamens 
4 or 5, opposite the petals on the throat of the hypanthium or on the disk; pistil of 
2 or 3 united carpels; ovaries united with the disk and hypanthium to form the 
berry-like fruit. 
KEY TO THE GENERA. 
Fruit fleshy, black, with a 1 to 3-celled stone. 
Petals present; young stems glaucous. ..- -- eee eeeeeee 1, Zizypuus (p. 413). 
Petals wanting; young stems not glaucous.............. 2. ConpDaALta (p. 418). 
Fruit dry or somewhat berry-like, 2 or 3-seeded. 
Plants low; petals hooded or long-clawed; stigmas 3.... 3. CeANoruus (p. 413). 
Tall shrubs 1 meter high or more; petals not clawed nor 
hooded; stigmas 2..........-----2----2-2-2020-0: 4, Roamnus (p. 414). 
1. ZIZYPHUS Juss. Lote Busa. 
Rigid spiny shrub 1 to 2 meters high, with glaucous young branches and small 
glaucous leaves, these 15 mm. long or less, ovate to oblong-elliptic, acute or obtuse; 
flowers small, in axillary corymbs; sepals 5, triangular, keeled within; petals and 
stamens 5, opposite each other on the disk; ovary 2 or 3-celled; fruit a pulpy black 
berry, green within. 
1. Zizyphus lycioides A. Gray, Bost. Journ. Nat. Hist. 6: 168. 1850. 
Type LOCALITY: Between Matamoros and Mapimi, Mexico. 
RANGE: Western Texas to southern New Mexico and northeastern Mexico. 
New Mexico: Mangas Springs; Berendo Creek; west of Cambray; Florida Moun- 
tains; Hachita; Dog Spring; mesa west of Organ Mountains; Organ Mountains. Dry 
mesas and hills, in the Lower Sonoran Zone. 
2. CONDALIA Cav. 
‘Very similar to the preceding, but the leaves spatulate and finely pubescent, and 
the petals wanting. 
1. Condalia spathulata A. Gray, Pl. Wright. 1: 32. 1852. 
Typr Locauiry: ‘‘On the Rio Grande, Texas; and prairies on the San Felipe.” 
Rance: Western Texas and New Mexico to northeastern Mexico. 
New Mexico: East of Hachita; Las Palomas Hot Springs; mesa near Las Cruces; 
Guadalupe Mountains. Mesas, in the Lower Sonoran Zone. 
This and the last occur together on the mesas of the southern part of the State. 
This plant is nearly always leafy, the leaves being more or less persistent, while 
Zizyphus lycioides is most frequently without leaves. Much of the time it appears 
to be merely a bush composed of spines. It may be recognized by its younger 
branches, which are always bluish green or glaucous, even after the leaves have fallen. 
The fruits of this and the preceding are sometimes eaten, but their seeds are very large 
and the amount of pulp small. 
3. CEANOTHUS L. BuckTHorRN. 
Low shrubs, more or less spinescent, mostly less than 1 meter high; leaves simple, 
alternate, with minute caducous stipules; flowers small, in crowded terminal racemes 
or corymbs; sepals 5, white, petaloid; disk filling the hypanthium; petals 5, white, 
long-clawed, hooded; stamens 5, exserted; ovary immersed in the disk; fruit at last 
dry, 3-celled, berry-like, 
