292 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
shiny, brownish, the areoles bearing at first a single brown spine and small brownish, 
terete, acute leaves; petals obovate, 3 cm. long, obtuse, yellow with reddish bases 
(when dry); ovary spineless but the few areoles crowded with brownish bristles. 
Described in part in the field from living plants in 
April, 1908, and in part from herbarium specimens col- 
lected from the same colony at flowering time by Dr. E. 
Palmer. 
Specimens examined: 
Chihuahua: Santa Eulalia near Chihuahua City, 
J. N. Rose, April, 1908 (no. 11675); same locality, 
Dr. KE. Palmer, 1908 (no. 69, type). 
Type U.S. National Herbarium no, 573546. 
This species is nearest O. phaeacantha, from which it 
differs in its larger, broader joints and lighter-colored 
spines and in its distribution, which is considerably 
south of the range of that species. 
Fic. 384.—Fruit of Opuntia lloydii. 
Natural size. 
Opuntia lloydii Rose, sp. nov. 
Pirate XNXV. Figure 34. 
A much branched shrub, 2 to 3 meters high; joints when young green, becoming 
glaucous, terete, the ultimate at maturity 1.2 to 1.7 em. in diameter; tubercles promi- 
nent, oblong; spines few on last year’s joints, near the base none, in the upper 
areoles 3, reddish, 1.1 cm. long; lateral spines ‘usually 
minute (0.6 mm, long); antepenultimate joints with 
a fourth spine, medially placed, 1 em. long, sheathed; 
leaves terete, 6 to 8 mm. long; flowers 8 cm. long 
(opening midday to mid-afternoon; petals 13 mm. 
long, 12 to 14 mm. broad, dull purple; style rose- 
color; fruit at first strongly tubercled, the tubercles 
with one to several minute spines (1 cm. long); fruit 
2 to 2.25 cm. broad, greenish and yellowish, irregu- 
larly colored, slightly and irregularly tuberculate; 
seeds 3 mm. wide, 1.6 mm. thick. 
Collected by F. E. Lloyd on footslopes, Zacatecas 
(no, 26). 
Type U. 8S. National Herbarium no. 535128. 
EXPLANATION OF PLATE XXV.—From photograph taken by 
F. E. Lloyd in northern Zacatecas, 
Opuntia pyriformis Rose sp. nov. 
PuatTE XXVIL Ficure 35. 
Widely spreading, sometimes 7 to 10 meters broad, 
the lower branches almost resting on the ground, 3 to 
5 meters high; joints pyriform, thick, 18 cm. long, 
perhaps often larger; areoles closely set (12 mm. 
apart), small, circular; spines 1 or 2, on old joints 6. 35.—Fruit of Opuntia pyri- 
more, usually reflexed, slender, weak, yellow, 1Q to Jormis. Natural size. 
22 mm. long; flowers yellow; fruit 4 cm. long, somewhat tubercled, spineless, the 
large areoles crowded with brown hairs forming hemispherical cushions, spineless. 
Collected by F. E. Lloyd chiefly in arroyos, northeast slopes of Pico de Teira (Pico 
Etereo), Hacienda de Cedros, Zacatecas, August 30, 1908 (no. 62). 
Type U. 8. National Herbarium no. 535200. 
EXPLANATION OF PLATE XXVI.—Joint with attachment. From photograph taken by F. E. Lloyd 
in northern Zacatecas. Scale 7/10. 
