FLOWERING PLANTS AND FERNS OF ARIZONA 847 



3. BOUVARDIA 



Plant sufTrutescent or shrubby, glabrous, 1 m. high or less; stems 

 branched, the old bark whitish brown; leaves mostly in whorls of 3, 

 the blades lanceolate or ovate-lanceolate, up to 8 cm. long; flowers 

 dimorphic in the length of the stamens and the style, in mostly 

 terminal cymes; calyx lobes subulate, persistent; corolla slender, 2 to 

 3 cm. long; capsules didymous, subglobose; seeds flat, peltate, winged. 



A handsome shrub, worthy of cultivation, with neat foliage and 

 clusters of bright red (occasionally pink or white) honeysucklelike 

 flowers. 



1. Bouvardia glaberrima Engelm. in Wisliz., Mem. North. Mex. 106. 

 1849. 



Bouvardia ovata A. Gray, PI. Wright. 2: 67. 1853. 



Southern Apache County to Cochise, Santa. Cruz, and Pima 

 Counties, 4,500 to 6,^500 feet, canyons and slopes, preferring partial 

 shade. May to September, type of B. ovata from between the San 

 Pedro River and Santa Cruz, perhaps in Arizona (Wright 1117). 

 Southern New Mexico and Arizona, and northern Mexico. 



4. CEPHALAXTHUS. Buttoxbush 



Shrub, up to 2.5 m. (8 feet) high; leaves large, opposite or in whorls 

 of 3, the blades broadly lanceolate to oblong-ovate; flowers small, 

 very numerous, in dense globose, long-peduncled heads, 4-merous; 

 corolla tubular-funnelform, whitish; fruits achenelike, obpyramidal, 

 2-celled, 1- or 2-seeded. 



1. Cephalanthus occidentalis L., Sp. PL 95. 1753. 



Apache, Gila, Maricopa, Pinal, and Pima Counties, 1,200 to 5,000 

 feet, wet soil along streams, June to September. Throughout most 

 of temperate North America. 



The Arizona form is var. californicus Benth., with shorter-petioled, 

 narrower leaves more often in 3's than in the typical form of the eastern 

 United States. The plant is not palatable to livestock and is reputed 

 poisonous, containing glucosides (cephalanthine, etc.). The bark 

 has been used medicinally. The flowers are attractive to bees. 



5. KELLOGGIA 



Plant herbaceous, perennial, with slender rootstocks, with the 

 aspect of Galium; leaves opposite, sessile, the blades lanceolate; 

 flowers in very open cymose panicles, small; calyx with an obovate 

 tube and minute teeth; corolla funnelform-salverform, whitish; 

 stamens inserted in the throat of the corolla; stigmas clavate. 



1. Kelloggia galioides Torr. in Wilkes, U. S. Expl. Exped. 17: 332. 



1874. 

 San Francisco Peaks, Bill Williams Mountain, both sides of the 

 Grand Canyon (Coconino County), Betatakin (Navajo County), 7.000 

 to 8.000 feet, rich soil in coniferous forests, June to August. Wyoming 

 to Washington, northern Arizona, and California. 



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