b'ecember 20, 1905 99 



hate, 1-2 cm. long, 4-8 mm. wide: flowers in the upper axils as 

 ■well as terminal, pale yellow, open in the middle of the after- 

 noon: calyx 2 mm. long, shortly hispid, the narrow linear lobes 

 divided to the base: petals 3 mm. long, obovate-oblong, less than 

 2 mm. wide across the rounded apex: capsules about 15 mm. 

 long, linear-clavate, barely 2 mm. wide above, hipsid, the hairs 

 barbellate: seeds whitish, very small, less than i mm. across, in 

 cross section roundish triangular or somewhat quadrate, the an- 

 gles obtuse, two of them grooved. 



The type is no. 7604, collected April 6, 1905, on the rising 

 plain back of Kern, Kern county, growing under the shade of 

 shrubs. This is no doubt pait of the composite Meiitselia dis- 

 persa of Watson, undoubtedly composed of several species, 

 among them perhaps A. i>iiietoruin {Mentzelia pinetorum 

 Heller, Bull. So. Cal. Acad. 3: 69. 1903). But the original, 

 Mentzelia albicaulis var. integrifolia Wats. Bot. King Rep. 114, 

 "which Watson says is the same as dispersa^ has priority of pub- 

 lication, and is apparently quite different from our plant, al- 

 though one could judge better if it were properly described. 



AcROLASiA PECTiNATA (Kellogg) Rydb. Bull. Torr. Club, 30: 

 278. 1903. 



Mentzelia pectinata Kellogg, Proc. Cal. Acad. 3: 40. f. p. 

 1868. 



No. 7634, collected April 8, on grassy slopes of the bluffs 

 of Kern river above Bakersfield, Kern county. It is also plen- 

 tiful on the ridges about the mouth of Kern canyon. The type 

 came from the "mountains above Visalia." It is apparently a 

 relative of A. gracilenta and is one of the handsomest species, 

 the orange of the petals shading into bright coppery red in the 

 center. The petals in our specimens are not notched but entire 

 surmounted by a very short apiculation. 



