830 MISC. PUBLICATION 42 3, U. S. DEPT. OF AGRICULTURE 



florescence various; bracts entire or parted; calyx with a tubular base 

 and a spathelike lobe, this often opposed by a more or less similar 

 bract, giving the appearance of a 2-lobed calyx; corolla narrow, bi- 

 labiate, the lips equal or unequal, the upper lip enclosing the stamens 

 and pistil; capsule compressed. 



Plants sometimes called birdsbeak, from the peculiar shape of the 

 corolla. C. wrightii is reported to be used by the Hopi Indians for 

 bleaching the skin. 



Key to the species 



1. Flowers in terminal capitate or short-spicate inflorescences, or sometimes 

 solitary at the ends of the branches; pubescence of the herbage not or 

 obscurely glandular; corolla lips nearly equal; seed coats alveolate (2). 

 2. Leaves and bracts entire; corolla 15 to 20 mm. long; anthers of the longer 

 stamens 2-celled, of the others 1-celled; herbage loosely villous. 



1. C. CANESCENS. 



2. Leaves and outer bracts 3- to 7-parted, the divisions nearly filiform; corolla 



20 to 30 mm. long, purple or yellow; anthers all 2-celled; herbage short- 

 pilose to glabrate 2. C. wrightii. 



1. Flowers scattered along the branches, 10 to 18 mm. long; outer bracts 3-cleft 



(3). 



3. Corolla bright yellow (drying purplish), cleft to the middle, the lower lip 



half to two- thirds as long as the upper; herbage hirsute below, villous 

 often slightly glandular above; anthers commonly 1-celled. 



3. C. LAXIFLORUS. 



3. Corolla mainly pink or lavender, not cleft to the middle, the lower lip more 

 than two-thirds as long as the upper one (4) . • 

 4. Tips of the outer bracts (and of the leaf lobes) dilated and whitish-callous; 

 anthers 1-celled; herbage hirsute or pilose, with few gland-tipped 



hairs; corolla not yellow-tipped 4. C. nevinii. 



4. Tips of the outer bracts not dilated or callous; anthers mostly 2-celled; 

 herbage copiously glandular-pilose; tip of the corolla yellow. 



5. C. PARVIFLORUS. 



*1. Cordylanthus canescens A. Gray, Amer. Acad. Arts and Sci. 

 Proc. 7: 383. 1868. 



Adenostegia canescens Greene, Pittonia 2: 181. 1891. 



No Arizona specimens have been seen by the writers, but the species 

 occurs at St. George, Utah, not far from the northern border. Utah 

 to California. 



2. Cordylanthus wrightii A. Gray in Torr., U. S. and Mex. Bound. 



Bot. 120. 1859. 



Adenostegia wrightii Greene, Pittonia 2: 180. 1891. 



Apache, Navajo, and Coconino Counties to Cochise and Pima 

 Counties, 5,000 to 7,000 feet, mostly in open pine forests, July to 

 October. Western Texas to Arizona and northern Mexico. 



A form with flowers solitary or 2 in the cluster, and with glabrate 

 or obscurely glandular-pub erul en t herbage, var. pauciflorus Kearney 

 and Peebles, is rather common on sandy plains in Apache and Co- 

 conino Counties. The type of the variety was collected near Tuba, 

 Coconino County (Kearney and Peebles 12884). 



C. tenuifolius Pennell (see footnote 39, p. 799, Pennell, p. 9) is related to C. 

 wrightii, but is described as having the apex of the floriferous bracts 3- to 5-parted, 

 rather than entire. The species was founded upon a collection at the Grand 

 Canyon (Eggleston 15677a). 



