528 GRIFFITHS: ADDITIONAL SPECIES OF OPUNTIA 
mann* from Stanley’s figures, has been recognized, although it has 
a considerable known distribution and is a very characteristic 
thing. I have seen fine specimens of it in the type locality near 
Solomonville, Arizona, and at various points to the southwest- 
ward. It extends in this direction as far as the Tucson region. 
I have had it in manuscript under a provisional new name for 
years from the latter region, but refrained from publishing on 
account of a suspicion that it might be this species on account of 
the shape of the joints as shown in the Stanley figures. A careful 
study of the pears of the type locality leaves no doubt in my 
mind as to its identity. 
Opuntia crystalenia sp. nov. 
An erect, tree-like form, 2-2.5 m. high with a distinct cylindri- 
cal trunk and tree-like top; joints broadly obovate to nearly sub- 
circular, about 18 X 25 cm., glaucous, blue-green, becoming 
more yellow after two years of age, at one year about 3 mm. long 
on sides of joints but enlarging irregularly and becoming sub- 
circular in age, at first tawny but turning gray; leaves small, 
4 mm. long, subulate, cuspidate, slightly flattened and becoming 
somewhat recurved at tip; spicules yellow, in a compact tuft in 
upper part of areole, not prominent, scarcely protruding from 
surface of joint, increasing only in occasional areoles in age; 
spines white, porrect in upper two thirds of joints only, one to 
three or four, usually two, variable, the longest 10-15 mm. in 
length and there are usually present one to two or three hair-like, 
delicate spines besides in the lower angle of the areole; flowers 
yellow, lighter colored within, filaments yellow above and greenish 
below, style white, stigma large, conical, dull dark green, ten- 
parted ; buds light, dull greenish red, with a slight grayish, glaucous 
sheen; fruit subglobose, medium sized, about 4—4.5 cm. in diameter, 
light red all the way through, flower-scar moderately dished to 
nearly flat, areoles tawny to brown, about 8 mm. apart and having 
prominent wool, variable spicules 1-2 mm. in length and four to 
ten delicate fugacious spines, 4-12 mm. long, tawny brown. 
This is a common species both native and in cultivation upon 
the Mexican highlands and is prized for its edible fruits. The type 
was collected at Cardenas, Mexico, under my inventory number 
8030 in August, 1905. It has been grown in our experimental 
plantings at Brownsville and San Antonio, Texas, and Chico» 
California. . 
* Emory’s Recon. Append. 2: 158. 1848. 
