74 
two extremes may be found. The frequency of occurrence seems 
to justify an individual name. 
Ficure-1. The specimen on the left represents the average form, while 
that on the right is apparently the extreme limit of variability. 
Koeberlinia spinosa Zuccarini var. verniflora Bogusch, vať. 
nov. A thorny leafless shrub up to 2 meters high; branches 
bright green, attenuated, 3-5 cm. long, sometimes only 1.5 cm. 
long in extreme cases, tapering gradually to the apical thorn; 
vesture of unicellular puberulence, more common near E 
florescence ; flowers in o pen fascicles, rarely umbellate; fruit as ™ 
the species. Flowers in March and April. A 
Frutices, aphylli, subglandulosi, ramosissimi, graciles; rami 
teretes, ramuli spinosi, viriduli, 1.5-5 cm. longi. Flores albi, parv! 
fasciculati sub ramulorum apicibus. Pedunculi fructiferi sub- 
glandulosi. 
Co-type: Fred Warren 1049, “Dry gravelly soil, Rio Grande 
City, Texas.” ” 
Type: Bogusch & Molby 4365, “Pasture near Weslaco, Texas. 
STATE COLLEGE oF WASHINGTON 
PULLMAN, WASHINGTON 
