218 BOTANY. 



Mex. Bound, p. 110). — Small tree, six inches in diameter at the base, 20 feet 

 high, with many slender branches ; wood resembling willow ; leaves 3-6' 

 long, 2-4" wide, slightly falcate, entire, and the older ones somewhat 

 sticky. The white or purple flowers 18" long in a terminal raceme; cap- 

 sules linear, 6-8' long. — Camp Goodwin, Arizona (344), where, from its 

 appearance and habitat, it is known as Desert Willow. 



ACANTHACE^E. 



Calophanes* decumbens, Gray, Syn. Fl. 1, 325 (C. oblongifolia, Torr. 

 Bot. Mex. Bound, p. 123, not Don). — Procumbent or ascending; herba- 

 ceous, except at base; leaves and axillary clusters of flowers secund; stem 

 pubescent, upper surfaces of the leaves slightly so, under surfaces almost 

 smooth, margins and midribs (below) a little hispid ; corolla light blue 1, 

 funnel-shaped, tube 7-8" long, border 6" in diameter, lobes ovate, calyx- 

 lobes linear, setaceous, equal in length to the tube of the corolla, but shorter 

 than the lanceolate bracts; seeds four. — Sanoita Valley, Southern Arizona, 

 at 5,500 feet altitude (637) 



RuELLiAf tuberosa, Linn., var. occidentalis, Gray (Syn. Fl. 1, p. 

 325). — A pubescent herb, 3° high, branched ; leaves oval, somewhat firm, 

 slightly hairy, tapering into a margined petiole; margins crenate or some- 

 what undulate; terminal panicle naked; flowers blue or purple, 1-2' long; 

 tube 6-8" long, suddenly expanded into a wide throat ; lobes roundish ; 

 stamens and style included ; calyx-lobes linear, setaceous pubescent ; cap- 

 sule somewhat hairy, lanceolate or club-shaped, 8-16-seeded. — Cienega, 

 Southern Arizona (560). Probably a good species. 



naked and diverging. Capsule long and linear, terete, resembling that of Calalpa, 2-celled, with the at 

 length loose narrow partition contrary to the valves. Seeds ohlong, thin, with the wing at each end 

 dissected into a woolly or finely bristly tuft. Cotyledons 2-lobed."— Fl. Cal. 1, p. 587. 



* Calophanes, Don. — Calyx deeply 5-cleft ; lobes setaceo-acuininate. Corolla-tubo straight, nar- 

 rowly cylindrical, somewhat dilated above ; limb somewhat spreading and slightly 2 labiate, the C> obovate 

 lobes somewhat unequal. Stamens 4, perfect, Blightly didynamous, inserted in pairs and connate below, 

 included; anthers fixed by the back, oblong, the cells nearly parallel, a little mucronate at base. 

 Style slender, curved above, hispid; ovules 2 in either cell. Capsule oblong-linear, contracted at the 

 base into a solid stipe, somewhat thickened above, 2-4-seeded. Seeds orbicular, flat, borne on acute 

 placental processes. — Herbs, with woody bases, erect or procumbent, the leaves entire, opposite or often 

 fascicled at the axils. The blue or pale flowers sub-sessile in the axils, few or many in a cluster, rarely 

 short cymose.— Benth. & Hook. I have kept this genus apart from Iiuellia solely in deference to 

 Bentham and Hooker. 



tRuicLi.iA, Linn. — Like Calophanes, except that the cells of the capsule have each more than two 

 seeds, and the anthers are pointless below. 



