32 
among western travellers as Bill Williams’s Fork), and south into 
Sonora: fl. May — July; fr. July and August. — A now well-known 
plant to travellers and botanists, 30-50 feet high, 1-2 feet in diam- 
eter; central spines 14-2} inches long. The yellowish-white 
flower 3-4 inches long. Fruit 2-3 inches long, often pear-shaped, 
and opening with 3 or 4 irregular recurved valves. 
30. C. Tuugsent, E. in Sill. Journ. 1854: caulibus erectis vel ad- 
scendentibus pluribus elatioribus articulatis 13 — 14-costatis ; aculeis 
7-15 gracilibus fusco-atris valde inzqualibus; ovario tuboque im- 
bricato-squamato ; bacca globosa magna. 
nora, west of the Sierra Madre: fl. June and July. —Stems 5- 
15 from one root, 10-15 feet high, 4-6 inches in diameter; spines 
slender, flexible, from 5-18 lines long. Flowers 3 inches long, 
white. Fruit like a large orange, of delicious flavor. 
Subgen 4. Pinocereus. Caulis elatus: fasciculi aculeorum steri- 
les a floriferis tenuioribus longioribus distincti: floris tubus brevis 
' squamosus : phylla pauciora: stigmata pallida: semina levia: em- 
bryo hamatus (in specie nostra !). 
31. C. Scuorti, E. in B. C. R.: caulibus erectis vel adscendenti- 
bus pluribus elatioribus articulatis 4—'7-costatis ; areolis in articulis 
sterilibus remotis ; aculeis brevibus robustis, radialibus 4—6, centrali 
unico ; areolis in articulis floriferis confertis ; aculeis 15 —25 longiori- 
bus setaceis flexuosis e rubello cinereis ; floribus carneis minoribus, 
tubo gracili decurvo ; bacca parva 
Sonora, towards Santa Magdalena: fl. July. Stems 8-10 from 
the same base, often growing in dense clusters, 8 or 10 feet high, 
with 2-4 articulations, 4 or 5 inches in diameter. Spines of the 
sterile part of the plant 3-4 lines long, on the fertile joints 1-4 
inches long, pendulous, forming a reddish-gray beard, in which the 
flower (not 2 inches long) is somewhat hidden. Seeds large : coty- 
ledons hooked, exactly as in the last two species. This is evidently a 
Pilocereus, but with the seed of a true Cereus, thus reuniting the 
former with the latter. 
Trib. II. ROTATA, Miquel. 
Aphylle seu foliose. Flores tubo abbreviato subrotati. Cotyle- 
dones facie versus hilum spectantes seminis lateri contrarie (incum- 
bentes). 
