56 BOTANY OF DR. A. WISLIZENUS’S EXPEDITION 
Near San Pablo another Echinocereus* was found, and dried flowers as well as [111 (27)} 
living specimens have safely arrived here. A large Hehinocactus* was collected near 
Pelayo; unfortunately no flowers were seen, but the specimen brought to St. Louis is so far in fine 
condition. Of another smaller but most elegant species of the same genus, Dr. Wislizenus col- 
lected the living plant and flowers, and Dr. Gregg the ripe fruit. It is distinct from 
the other Hehinocacti found in those regions by the membranaceous very thin sepaloid [112 (28)] 
spines in different specimens 2 to 4 lines long. Flowers in the-northern specimens, from Industry, 2 inches long and 
wide, in those from New Braunfels 24 to 3 inches in diameter and length, generally a little wider than long when 
fully open ; brown or black bristles on the tube 2 to 5 or 6 lines long, surrounded by wool, which is often 3 lines 
in length. 
46 ECHINOCEREUS ENNEACANTHUS, n. sp.: ovato-cylindricus 10-costatus ; areolis elevatis, orbiculatis, distantibus, 
junioribus breviter albo-tomentosis ; aculeis angulatis, compressis, rectis, albis; radialibus 8 subsequalibus, centrali 
singulo longiore, demum deflexo ; floris tubo pulvillis 30-35 albo-tomentosis setas spinescentes albidas fuscatasque 
inferioribus 6, superioribus 2-3 gerentibus stipato; sepalis interioribus 10-13 oblongo-linearibus, petalis 12~14 
lineari-oblongis obtusis s. mucronatis, apice denticulatis; stigmatibus supra stamina brevia exsertis, 8-10 linearibus 
elongatis. 
Near San Pablo, south of Chihuahua; flowers in April. Plant 5 to 6 inches high, 3 to 4 in diameter, branching 
from the base ; areole about 1 inch distant from one another; spines stout, angular, like those of E. triglochidiatus, 
lateral spines 9 to 16, central one 18 to 22 lines long. Flowers 24 to 3 inches long, red; spiny bristles in the axils 
of the lowest sepals (on the ovary), four brown 2 to 4 lines long, and two white 3 to 4 lines long; higher up the 
number of the brown bristles diminishes, and on the upper part of the tube we find only two white bristles of 6 lines 
length in the axils. 
41 EcSINOCACTUS FLEXISPINUS, n. sp.: globosus, vertice snbnudo, costis 13 obliquis, tuberculato subinterruptis ; 
areolis ovatis, junioribus albo-tomentosis, distantibus ; aculeis junioribus rubellis, demum cinereis ; radialibus 9-11 
rectis s, subflexuosis, superioribus tenuioribus, infimo breviori, curvato, lateralibus longioribus compressis annulatis, 
rectiusculis ; centralibus 4 angulatis compressis annulatis, 3 superioribus rectiusculis s. curvatis, inferiore longissimo 
flexuoso, plerumque paulo uncinato, deflexo. 
elayo, between Chihuahua and Parras. The specimen before me is 10 inches high, and the same in diameter; 
ribs thick but not rounded ; areole (without the floriferons areolw, which are 3 to 4 lines long) 6 lines long and 
4 wide, 1 or 14 inch distant; upper spines the most slender, 1} to 14 inch long; lowest one 1 to 1} inch long, 
stouter; lateral spines 14 to 3 inches in length, slightly and sometimes indistinctly annulated ; upper central 
spines 2§ to 4 inches long ; lower spine stoutest, 4 to 5 inches long, mostly deflexed, often flexuous and twisted, 
more curved or even hooked at the extremity, much compressed, 4-angled, sharply carinate above and below, slightly 
48 EcHINOCACTUS UNGUISPINUS, n. sp.: depresso-globosus, costis 21 interruptis tuberculatis, areolis approximatis 
junioribus albo-tomentosis ; aculeis radialibus sub-21 tenuioribus, albidis, recurvis, intertextis, centralibus 5 (rarius 
robustioribus, longioribus, corneis, sursum versis, singulo robustissimo, fusco deorsum flexo ; floris ovario tuboque 
brevi sepalis membranaceis, auriculato-cordatis, fimbriatis stipato; petalis oblongis obtusis; stigmate brevissimo conico 
10~-15-sulcato (s. partito 7). 
About Pelayo; flowers in May. A very elegant plant ; the specimen before me 4 inches in diameter, 3 inches in 
height. The large recurved spines — especially the stoutest central one, which is of a bluish horn-color, with a brown 
point, and is curved and bent downward like a large fang — cover the whole surface of the plant, and give it a very 
pretty ap ce. Lower radiating spines 6 to 10, upper 12 to 15 lines long ; upper central spines 12 to 18 lines 
long, but lower stouter one only 10 to 12 lines in length. Flowers described froma the shrivelled specimens found on the 
living plant, about 1 inch in length, and probably pale red. I have little doubt that some fruits collected in the same 
region (about San Lorenzo) by Dr. Gregg belong to this species; the fleshy oval berry is 10 or 12 lines long, covered 
with the same auriculate thin scales which we find on the flowers, and crowned with the remnants of the flower ; seeds 
black, much compressed, somewhat rough, albumen considerable, embryo curved, cotyledons short obtuse. This 18 4 
very remarkable plant, and approaches in shape some Mamillaria; the tubercles which form the interrupted se 
are sideways compressed, have a tomentose groove on their upper edge, which ends in a regular axillary depress’ 
areola, like that of a true Mamillaria, but the scaly ovary and the curved embryo prove it to be an Echinocactus- 
The specimen brought here by Dr. Wislizenus died soon after it arrived, as many of those collected in April and May 
during the flowering season, though only two months on the road, while those collected the year before, between 
August and November, which had been packed up for eight or ten months, mostly do very well now. Dr. Gregg’ 
seeds, however, have germinated well. 
i ee — 
TOR 
