CHORIZANTHE. 55 



long ciliate hairs externally, extending beyond the segments in an irreg- 

 ular fringe; stamens 9 (or less), with short filaments on the throat; an- 

 thers dull reddish, orbicular; stigmas short, recurved; akene narrowly 

 triangular; embryo i line in length, with linear cotyledons and slender 

 radicle. 



Habitat: Exposed sandy soil on Pt. I,oma, San Diego, March, 1884. 

 Specimens received while this paper was in press, and appropriately 

 dedicated to its enterimsing discoverer, C. R. Orcutt. A most inter- 

 esting addition to this section, and the only representative thus far met 

 with directly on the coast. Increases the number of species from 28 

 (see page 48) to 29. 



§4. MuCRONEA, Torr. & (iray. Involucres i Howered, with 2-4 

 rigid, divergent, accuminate divisions, tube oblong, somewhat con- 

 tracted at the throat, horizontally flattened or sharply angled and sul- 

 cate; flowers long, pedicellate, exsert; segments of perianth entire or 

 laciniate; stamens 9, at the base; involucral bracts unilateral, broadly 

 foliaceous, trifid, cuspidate, more or less perfoliate. 



10. C. PERFOLiATA, Gray, Watson, 1. c. Decumbent, branching 

 from the base, 6-12 inches broad, smooth or more or less glandular 

 pubescent; radical leaves, broad, spathulate, sessile, smooth, with short 

 ciliate margins ; cauhne and involucral bracts broadly triangular-trifid, 

 more or less perfoliate, abru])tly accuminate, similar but smaller above; 

 secondary branches rather scattered, usually simple prolonged ; involu- 

 cres coriaceous rigid, 2 lines or less hi length, slightly curved, quadran- 

 gular and sharply costate, divisions 4, slightly unequal, divergent, and 

 terminating in straight rigid awns; flowers pedicellate, exsert, deeply 

 parted ; perianth segments e(iual, conspicuously nerved, abruptly 

 notched at the summit, and irregularly laciniate on the edges ; stamens 

 9, at the base, anthers oval, deep red ; styles slender, recurved ; akene 

 triangular ; embryo with oval cotyledons, as long as the radicle. 



Habitat : Mojave desert, and rocky sloi)es of Tehachipi Pass, May. 

 Whole plant reddish-purple at maturity. 



11. C. Californica, Gray. Miicronca Califoniica, Benth., J -inn. 

 Trans., XVTI., t. 20. Erect, 4-8 inches high, hispidq)ubescent, dicho^ 

 tomously branching from a short caudex ; radical leaves narrowly 

 spathulate, more or less hairy pubescent ; cauline bracts unilateral, 

 broadly trifid, accuminate ; involucres more or less clustered in the 

 axils, tube flattened, smooth or obscurely glandular, divisions 2, broadly 



