(417) 
Calyx and herbage clothed with sa llee Fase ike etete pubescence. 
Lea 6-8 cm. broad, rugose by the pubescence; 
calyx-lobes triangular. . M. Davidsoni. 
Leaves 2-3 cm. broad; nut rugose; wathice of calyx-tube completely 
hidden by the dense hoary hispid pubescence; calyx-lobes lanceolate- 
acuminate, 4. M. orbiculatus. 
1. MatacorHamnus Fascicutatus (Nutt.) Greene, 
Leaflets 1: 208. 1906. 
Malva fasciculata Nutt. in Torr. & Gray, Fl. N.Am.1: 226. 1838. 
Malvasirum fasciculatum Greene, Fl. Fran. 108. 1891. 
Malvastrum Thurberi A. Gray, Mem. Am. Acad. II. 5: 307. 1855. 
ype locality: “St. Barbara.” Nuttall’s specimens are like 
the form occurring at San Diego, where he probably obtained his 
specimens, as the species has not since been found at Santa Barbara. 
Distribution: The typical form seems to be confined to south- 
western San Diego County. Upper and Lower Sonoran. 
Specimens examined: ‘St. Barbara” (2), Nuttall; San Diego, 
Brandegee (distributed by Baker 1626); Orcutt, 1884; Palmer 
25; Abrams 3420; Chollar Valley, Susan G. Stokes, June 15, 1895; 
Lemon Grove road, Chandler 5208. 
1a. Malacothamnus fasciculatus splendidus. (Kell.) 
Malvasirum splendidum Kell. Proc. Calif. Acad. 1: 67. 1855. 
Malvastrum Thurberi laxiflorum A. Gray, Proc. Am. Acad. 22: 291. 
1887. 
Type locality: Contributed by “Mr. M. A. Wallace of Los 
Angeles,” who probably collected it on the neighboring hills. 
Distribution: Santa Monica and San Fernando Mountains, 
southward to the Santa Ana Mountains and eastward to the San 
Bernardino Mountains. Upper Sonoran. 
Specimens examined: Cahuenga Pass, Davidson, May 1, 1892, 
and April 10, 1900; Abrams 1246; Verdugo Hills, Abrams 1382; 
near San Bernardino, Parish, June 15, 1898, Laguna, Orange 
County, Abrams 1781 
2. Malacothamnus Nuttallii sp. nov. 
rub, 2-3 meters high; branches erect or oe canescent 
ie a short-rayed ee te pubescence; petioles 1.5-2.5 cm. long; 
leaves acutely 5-lobed, crenate-serrate, sli a, or not at all cor- 
ate, 2.5-4 cm. long, equally hoary on both surfaces with a close, 
