FLOWERING PLANTS AND FERNS OF ARIZONA 501 



Key to the species 



1. Pubescence of the herbage and pods conspicuously shaggy-villous, that of the 

 pods tawny; petioles very short; leaflets 3, broadly obovate, the terminal 

 one 18 to 35 mm. wide; corolla 2.5 to 3 cm. long 1. C. lemmoxi. 



1. Pubescence of the herbage and pods appressed or subappressed, grayish; peti- 

 oles elongate ; leaflets 3 to 5, linear, linear-lanceolate, narrowly oblong, or ellip- 

 tic, the terminal one not more (commonly much less) than 10 mm. wide, up 

 to 15 cm. long; corolla 2 to 2.5 cm. long 2. C. loxgifolia. 



1. Cologania lemmoni A. Grav, Amer. Acad. Arts and Sci. Proc. 19: 



74. 1883. 

 Chiricahua and Huachuca Mountains (Cochise County), Rincon 

 Mountains (Pima County) . 6.000 to 7.300 feet, openings in pine for- 

 ests. August, type from the Huachuca Mountains (Lemmon 2681). 

 Southern Arizona and northern Mexico. 



2. Cologania longifolia A. Gray, PL Wright. 2: 53. 1853. 



Apache County to Coconino County, south to Cochise, Santa 

 Cruz, and Pima Counties, 4,000 to 9,000 feet, rich soil of coniferous 

 forests, July and August. Western Texas to Arizona and northern 

 Mexico. 



A very variable complex, possibly separable into more than one 

 species. The genus needs revision. 



53. ERYTHRINA. Coraltree 



Plant shrubby or arborescent, with prickly stems and petioles; 

 leaves pinnately 3-foliolate, with large fan-shaped leaflets; flowers in 

 axillary or terminal racemes, large and showy; corolla bright red, the 

 banner petal much longer than the others, about 5 cm. long, strongly 

 keeled; stamens partly exserted; pods large, thick-walled, torulose; 

 seeds several, large, normally bright red. 



1. Ervthrina flabelliformis Kearnev, X. Y. Acad. Sci. Trans. 14: 32. 

 1894. 



Mountains of Cochise and Pima Counties, 3,500 to 5,000 feet, fairly 

 common on dry rocky slopes, spring and sometimes late summer. 

 Southwestern New Mexico, southern Arizona, and Mexico. 



This plant, known as western coralbean, Indian-bean, and chilicote, 

 reaches a height of 4.5 m. (15 feet) and a trunk diameter of 25 cm. (10 

 inches), but is usually much smaller. The wood is brittle, the bark 

 light brown with longitudinal white lines. The flamelike flowers 

 appear mainly in spring before the leaves appear. The plant has 

 been cultivated locally but scarcely can be recommended as an orna- 

 mental on account of its sensitiveness to frost and the long period 

 when it is leafless. The plant is said to be browsed, but the attractive 

 scarlet seeds contain poisonous alkaloids. In Mexico necklaces are 

 made of them. 



54. GALACTIA 



Perennial, herbaceous or sometimes slightly suffrutescent ; stems 

 long, commonly twining; leaves pinnately 3-foliolate, the stipules 

 small, fugacious, the leaflets with stipels, elliptic, oblong, or oblong- 

 lanceolate; flowers in axillary, peduncled, bracted racemes; calyx 4- 



