FLOWERING PLANTS AND FERNS OF ARIZONA 831 



3. Cordylanthus laxiflorus A. Gray in Torr., U. S. and Mex. Bound. 



Bot. 120. 1859. 



Adenostegia laxiflora Greene, Pittonia 2: 181. 1891. 



Navajo, Coconino, Yavapai, and Gila Counties, 4,000 to 6,000 feet, 

 dry slopes and mesas, sometimes with Cupressus glabra, August to 

 October. Known only from central Arizona. 



4. Cordylanthus nevinii A. Grav, Amer. Acad. Arts and Sci. Proc. 17: 



229. 1882. 

 Hualpai Mountain, Mohave County (Goldman 2995, Kearney and 

 Peebles 12699), about 6.500 feet, among yellow pines, September. 

 Western Arizona and southern California. 



5. Cordylanthus parviflorus (Ferris) Wiggins, Contrib. Dudley 



Herbarium Stanford Univ. 1: 174T 1933. 



Adenostegia parciflora Ferris, Torrev Bot. Club Bui. 45: 409. 

 1918. 



Coconino and Mohave Counties, from the northern border of the 

 State to 80 miles southeast of Kingman, 2,600 to 7.000 feet, dry stony 

 slopes and mesas, often with juniper, August and September, type 

 from the Grand Canyon (Knowlton 270). Known only from north- 

 western Arizona. 



22. ORTHOCARPUS. Owlclover 



Plants annual; stems leafy, mostly erect; leaves alternate, sessile or 

 nearly so, entire to pinnately parted; inflorescence spicate, usually 

 dense, leafy-bracted, the bracts green or purple; calyx narrowly cam- 

 panulate; corolla bilabiate, the lips approximately equal, the lower 

 lip entire to tri-sacculate at apex. 



Key to the species 



1. Leaf blades and bracts pinnately parted, the divisions narrowly linear or 

 filiform; tips of the bracts and calyx lobes purplish pink, as is the corolla; 

 lower lip of the corolla trisacculate at apex, much wider than the galea; 

 stigma large, much wider than the style, depressed-capitate: herbage 



villous-hirsute, not scabrous 1. O. pukpurascens. 



1. Leaf blades entire or 3-cleft; tips of the bracts and calyx lobes green; lower 



lip of the corolla entire or rather obscurely tridentate, not sacculate, at 



apex: stigma small, scarcely wider than the style; leaves scabrous-puberu- 



lent (2). 



2. Inflorescence many-flowered, usually dense: leaf blades mostly entire, 



linear or lanceolate: corolla yellow: tip of the galea obtuse, not inflexed; 



lower lip about as long as and not much wider than the galea. 



2. O. LUTEF<. 



2. Inflorescence few-flowered, loose; leaf blades mostly 3-cleft, with filiform 

 lobes; corolla purple and white; tip of the galea mucroniform, inflexed; 

 lower lip somewhat shorter and much wider than the galea. 



3. O. PURPUREO-ALBUS 



1. Orthocarpus purpurascens Benth., Scroph. Indie. 13. 1S35. 



Mohave County to Graham, Gila, Maricopa, Pinal, and Pima Comi- 

 ties, 1.500 to 3,500 feet, open mesas and slopes, March to May. 

 Western and southern Arizona, California, and Baja California. 



Escobita. In favorable seasons, extensive areas are bright purple 

 with the flowers of this owlclover, which is grazed by cattle and sheep. 



2SG744 — 42 53 



