(453) 
5. PENTSTEMON BREVIFLORUS Lindl. Bot. Reg. 23: pl. 1946. 
1837. 
Type locality: Collected by Douglas, probably near Monterey. 
Distribution: Foothills of the Coast Ranges and the Sierra 
Nevada in Central California, extending southward to the Liebre 
Mountains in southern California. Upper Sonoran. 
Specimens examined: Between Oakgrove Canyon and Elizabeth 
Lake, Abrams &§ McGregor 400. 
2. DIPLACUS. BusH MONKEY-FLOWER. 
Flowers yellow or buff. 
Corolla-tube much exceeding the calyx; lobes not erose-toothed; calyx 
and leaves not pubescent. 1. D. aridus. 
Corolla-tube proper not exceeding the calyx; lobes erose-toothed; leaves 
pubescent beneath; calyx usually woolly. 2. D. longiflorus. 
Flowers scarlet; corolla-lobes not erose-toothed; calyx glabrous. 
3. D. puniceus. 
1. Diptacus aripus Abrams, Bull. Torrey Club 32: 540. 1905, 
Type locality: “Growing on dry rocky ridges at Jacumba near 
the boundary monument.” 
Distribution: Desert slopes of the Cuiamaca Mountains near 
the International Boundary. Upper Sonoran. 
Specimens examined: Jacumba Hot Spring, Abrams 3656. 
2. DipLacus LONGIFLoRus Nutt. Ann. Nat. Hist. 1: 139. 1838. 
Mimulus glutinosus brachypus A. Gray, Bot. Calif. 1: 566. 1876. 
Diplacus arachnoideus Greene, Bull. Calif. Acad. 1: 210. 1885. 
Diplacus calycinus Eastw. Bot. Gaz. 41: 287. 1906. 
Type locality: “In rocky places by small streams, in the vicinity 
of Sta. Barbara (Upper California).” 
Distribution: Southern Sierra Nevada and Santa Barbara 
County, southward to northern Lower California. Upper Sonoran. 
The form with a glabrous calyx, which occurs in San Diego 
County, may be distinct, but the genus needs a thorough revision 
before more forms are segregated. 
Specimens examined: Santa Barbara, Elmer 3959; Mission 
Canyon, near Santa Barbara, Eastwood 19; Los Angeles, Hasse, 
Oct. 1887; Sepulveda Canyon, Santa Monica Mountains, Abrams 
2543; vicinity of San Bernardino, Parish 4792; Ysidora, Abrams 
3287; between Campo and Potrero, Abrams 3716. 
