334 SCROPHULARIACEAE. 



leaves opposite or ternate, oblong to acutely ovate, 2 cm. long or 

 less, the upper much reduced, sessile, entire, rather thick, the 

 margins somewhat revolute; calyx-lobes broadly lanceolate, acute; 

 corolla light blue, 5-8 mm. long; the lips about equaling the moder- 

 ately gibbous throat, their lobes entire, equal in length; capsule 

 globose, shorter than the calyx-lobes. 



First collected in Swartout Canyon, San Antonio Mountains, 

 Hall; Mt. Gleason, Elmer. 



7. DIPLACUS Nutt. 

 Low evergreen glutinous shrubs, with opposite leaves 

 which are revolute in the bud, and large red, orange or 

 salmon-colored flowers, solitary In the axils. Calyx 

 tubular, 5-angled and 5-toothed. Corolla with funnel- 

 form tube and rather broad bilabiate limb. Stamens 4. 

 Stigma of 2 flat lobes closing together when irritated. 

 Capsule firm, coriaceous, opening down the upper suture 

 only, the valves spreading out nearly flat. 



1. D. longiflorus Nutt. Low, suffrutescent, 5-10 dm. high, 

 rilore or less branched throughout, viscid-pubescent or the inflores- 

 cence and growing parts villous and somewhat glandular; leaves 

 narrowly or broadly lanceolate, more or less acute, 3-7 cm. long, 

 rather thin, the margins often revolute, denticulate or dentate; 

 calyx about 2.5 cm. long and about 8 mm. broad; the lobes 5-7 mm. 

 long, the upper a little longer, villous with viscid hairs; corolla about 

 5 cm. long; the lobes of the upper lip shallowly 2-lobed, their margins 

 wavy or erose; those of the lower lip usually truncate, more or less 

 deeply crenately toothed. 



Common on all the foothills and in the chaparral belt of the 

 mountains. We have seen no specimens with the strongly arach- 

 noid pubescence which is found on the plants about Santa Barbara, 

 the type locality of this species. Two quite different forms occur 

 with us: the one from which the above description is drawn occurs 

 in the Santa Monica Mountains, and is nearest the type; but about 

 Los Angeles and Pasadena the plants are usually less villous and have 

 a slender (about 5 mm. broad) calyx, and narrower corolla-throat 

 which tapers gradually to the slender tube. 



2. D. puniceus Nutt. Resembling the last in habit; leaves 

 usually narrowly lanceolate, the margins strongly revolute; calyx 

 15-20 mm, long, 5 mm. broad, viscid, not at all woolly, its lobes 4-5 

 mm. long; corolla 2-2.5 cm. long, scarlet, the lobes of the lower lips 

 rather narrow, emarginate or retuse. 



Common on dry hillsides about San Diego and ranging northward 

 to the Santa Margarita River, where it seems to intergrade with 

 D. longiflorus. 



8. MIMULUS L. Monkey-flower. 

 Herbs with opposite leaves and mostly showy yellow 

 or red flowers solitary and axillary or in a terminal 



