CATALOGUE. 127 



branches prostrate, running 10-20 feet." Segments of the upper leaves 

 2-4" wide and 3' long; lower leaves wider and shorter, somewhat lobed. 

 Corolla yellow, 3' long, funnel-shaped. — Arizona (441). Fruit 3' iii diameter, 

 green, with white, longitudinal stripes. 



CACTE^. 



By Dk. George Engelmann. 



Mamillaria (Coryphantha) vivipara, Haworth, Engelm. in Watson's 

 Bot. King's Expl. 117. — A common plant on the Western plains from the 

 Missouri to Texas, extending in the mountain regions as far west as Arizona 

 and South Utah, the large, deep rose-colored or purple flowers, with fringed 

 sepals and lance-linear, acuminate petals, green, oval berries, with light 

 brown, pitted seeds, readily distinguish the species. The form of the plains 

 is lower and often densely cespitose-spreading; the mountain plant is often 

 simple and larger. The largest form, which comes from Arizona, I had at 

 one time distinguished as M. Arizonica, but must now consider it as only a 

 gigantic vivipara, 3-5' high, 4' in diameter, with spines often over 1' long 

 on rather broad and spreading tubercles. Rothrock, 1874, (203), is a smaller 

 form, from Camp Apache, Ariz. 



Mamillaria (Coryphantha) chlorantha, n. sp. — Similar to the last, 

 but with broader yellow petals; stems oval to cylindrical, 3' wide, some- 

 times 8-9' high; tubercles compressed from above; 20-25 outer spines gray, 

 almost in 2 series; 6-8 or 9 inner ones stouter, \—\! long, reddish or 

 brownish only at the tip ; flowers yellowish or greenish-yellow, crowded on 

 the top of the plant, \h' long and wide, often 1-2 small, fringed sepals on 

 the ovary (which also occasionally is seen in vivipara) ; sepals lanceolate, 

 fringed; petals lanceolate or linear-lanceolate, acute, denticulate; 7-9 

 whitish stigmas, erect-spreading. — Southern Utah, east of Saint George, Dr. 

 Parry. I. E. Johnson. 



Echinocactus Wislizeni, Engelm. — Very large, often over 3° high 

 and half as much in diameter; at first globose, then ovate to cylindrical, 



iiud many-seeded. Seeds ovate or oblong. Stems animal, roots perennial, often procumbent and rooting. 

 Leaves cordate at base and lobed. Tendrils 2-ruauy-cleft. Flowers largo, yellow. Fruit often very 

 large.— Bentiiam & Hookeu. 



