30 University of California Publications in Botany. [VOL. 3 



1902, Brandegee; Inyo Mts., Austin, no. 565; a frequent and 

 characteristic plant in the clefts of rocks within the Lower Son- 

 oran Zone from the Inyo Mts. east into Nevada, ace. to Coville; 

 Fort Mohave, Arizona, Lemmon; Nevada, Purpus, no. 6022; St. 

 George, Utah, Goodding, no. 803; Southern Nevada, Goodding, 

 no. 678, ace. to Nelson (as Coleosanthus venulosus, the identity 

 of which with B. atractyloides has been pointed out by Robin- 

 son). 4 



2. B. incana Gray, Proc. Am. Acad. vii. 350 (1868). Coleo- 

 santhus incanus Kuntze, 1. c. 



Three to 6 dm. or more high, loosely branched from a suffru- 

 tescent base: herbage white with a close tomentum which is de- 

 ciduous from the stems, exposing the white bark : leaves alternate, 

 sessile, ovate or broader with roundish or subcordate base, 

 obtuse to acute but not pointed, entire or the margins sinuate, 

 1 to 3 cm. long : heads 40 to 50-flowered, campanulate, solitary and 

 terminal on the branchlets : involucre broadly campanulate, 15 to 

 20 mm. high ; bracts firm-chartaceous, regularly imbricated ; short 

 outer ones ovate, obtuse; inner ones linear-lanceolate, acute: 

 achenes 9 or 10 mm. long, cinereous-pubescent. 



Dry gravelly soil of the Mohave Desert, especially in sand- 

 washes of the Lower Sonoran Zone : Cushenberry Springs, Parish, 

 nos. 1248, 2388; Providence Mts., Cooper, ace. to Gray, also 

 Brandegee ; near the Needles, Brandegee ; Ash Meadows, Nevada, 

 Purpus, no. 6041 ; reported from Chuckawalla Bench, Colorado 

 Desert, California, by the Riverside Botanical Club. 



3. B. linifolia Eaton, Bot. King Exped. 137, t. 15, ff. 1 to 6 

 (1871). B. Mohavemis Gray, Syn. Fl. i. pt. 2, 104 (1884). 

 Coleosanthus linifolius Kuntze, 1. c. 



Stems numerous, leafy, ascending or erect, forming round- 

 topped clumps 2 to 4 dm. high : herbage cinereous-pubescent and 

 also somewhat glandular at least above : leaves from broadly ob- 

 long with narrow base to linear or spatulate, acute, entire or with 

 1 or 2 short teeth, 1.5 to 3.0 cm. long, only the midnerve promi- 

 nent: heads 30 to 50-flowered, scattered, the peduncles exceed- 

 ing the leaves : involucre campanulate, 12 to 14 mm. high ; bracts 



Proc. Am. Acad. xlii. 47 (1906). 



