MORNING-GLORY FAMILY 387 



elevations, Transition Zones; southern Sierra Nevada between the Kaweah and Kings Rivers. Type locality: 

 Millwood,' Fresno County, California. 



12. Convolvulus polymorphus Greene. Modoc Morning-glory. Fig. 3864. 



Convolvulus polymorphus Greene, Pittonia 3: 331. 1898. 



Low plants with slender, erect or trailing stems sometimes slightly twining at the apex, 

 herbage grayish green and more or less puberulent. Leaves broadly to narrowly hastate or 

 subsagittate, 2-4 cm. long, acute to rounded at apex, the basal lobes rounded to broadly and 

 shallowly 2-toothed; petioles mostly shorter than the blades; peduncles mostly shorter than 

 the leaves 1-flowered; bracts 1-5 mm. below the calyx, green, linear-lanceolate to oblong, 4-lU 

 mm long'- sepals very unequal, the outer rounded or broadly emargmate at apex, the inner 

 usually broadly obtuse, rather obscurely mucronate, puberulent ; corolla white, yellowish within, 

 25-30 mm. long. ^ T^ i 



Open or brushy slopes often in rocky soils, mainly Arid Transition Zone; southern Oregon from Douglas 

 and Klamath Counties south to Lake and Nevada Counties, northern California. Type locality, northern 

 California. April-July. 



13. Convolvulus Piersonii Abrams. Pierson's Morning-glory. Fig. 3865. 



Plants glabrous and glaucous throughout; stems slender trailing, or ascending and some- 

 what twining, 15-35 cm. long. Leaves lanceolate-hastate, the central lobe 15-20 mm. long, 5-10 

 mm wide at base, often mucronate at apex, lateral lobes commonly nearly as long as the cen- 

 tral and about as wide, entire or with 1 or 2 shallow teeth; petioles 5-15 mm long; pedurxles 

 1-flowered, 1-5 cm. long, often curved; bracts broadly to narrowly oval, closely subtending 

 the calyx or attached a short distance below it, barely half the length of the sepals greenish 

 or purplish, obtuse to rounded at apex ; sepals oblong-oval, 10-12 mm. long, rounded at apex 

 and usually retrorsely mucronate; corolla white 3-4 cm. long. 



Glaber et glaucus, caule herbaceo procumbente aut volubili 15-35 cm. longis, foliis lanceolatis-hastatis 

 15-20 mm. longis. petiolis 5-15 mm. longis. bracteis ovatis vel oval-oblongis 5 mm. longis, sepalis oblongo- 

 ovalis 10-12 mm. longis obtusis, corolla 3-4 cm. longis. 



Dry soils in open desert scrub, Sonoran Zones; Antelope Valley and base of the desert slopes of the San 

 Gabriel Mountains, Los Angeles County, California. Type collected at Rock Creek. San Gabriel Mountains, 

 Los Angeles County, California, Pierson 3537 (no. 139597 Dudley Herbarium). May-June. 



14 Convolvulus occidentalis A. Gray. Western or Bush Morning-glory. 



Fig. 3866. 



Convolvulus occidentalis A. Gray, Proc. Amer. Acad. 11: 89. 1876, as to original type. 

 Convolvulus luteolus A. Gray, Proc. Amer. Acad. 11: 90. 1876. Not Spreng. 1835. 

 Convolvulus luteolus var. purpuratus Greene, Man. Bay Reg. 265. 1894. 

 Convolvulus purpuratus Greene, Pittonia 3: 332. 1898. 



Stems woody, climbing over shrubs or in open places trailing, glabrous or nearly so. Leaves 

 4-8 cm. long, triangular-hastate with a V-shaped or rounded sinus, lateral lobes often irregu- 

 larly 2-toothed, terminal lobe commonly long-acuminate; petioles much shorter than the blades; 

 peduncles well-exceeding the leaves, 1-3-flowered; bracts linear-subulate, 5-10 mm. long, 5-15 

 mm. below the calyx ; sepals unequal, 6-12 mm. long, mostly oblong-elliptic, obtuse to truncate 

 at apex, mucronate, coriaceous often purple-tinged ; corolla pink, purple or dull creamy white. 



Stream banks and canyon slopes. Transition and Upper Sonoran Zones; California Coast Ranges, Hum- 

 boldt County to Monterey County. Type locality: "near San Francisco, Dr. Gibbons according to the speci- 

 men in the Gray Herbarium on which Dr. Gray wrote the "very original of C. occtdentahs. May-July. 



Convolvulus occidentalis subsp. fruticetorum (Greene) Abrams. (Convolvulus fruticetorum Greene, 

 Pittonia 3: 333. 1898; Convolvulus purpuratus var. fruticetorum House, Muhlenbergia 1: 55. 1908.) 

 Climbing over bushes, the stem woody, glabrous and glaucous; leaves 3-6 cm. long and about as broad across 

 the broad usually toothed basal lobes, terminal lobe broadly to rather narrowly triangular, glabrous or mi- 

 nutely and sparsely puberulent beneath, the sinus broadly (J-shaped; bracts longer than in the typical species, 

 linear-lanceolate to narrowlv oblanceolate. Josephine County, Oregon, south through the Inner Coast Ranges 

 to Napa County, and on western slopes of the Sierra Nevada to Amador County, California. Type locality: 

 "bushy foothills of the Inner Coast Ranges of California." 



Convolvulus occidentalis subsp. saxicola (Eastw.) J. T. Howell, Leaflets West. Bot. 5: 45. 1947 {Con- 

 volvulus saxicola Eastw. Bull. Torrey Club 30: 495. 1903; C. luteolus var. saxicola Jepson, Man. Fl. PI. Calif. 

 779. 1925; C. purpuratus \2ir. saxicola Jepson, Fl. Calif. 3: 124. 1939.) Low trailing, glabrous throughout; leaves 

 deltoid-sagittate to cordate-sagittate, 2.5-4 cm. long; peduncles slender, usually about as long as the petioles; bracts 

 remote from the calyx, varying from lanceolate-subulate to foliaceous and lanceolate-hastate. Rocky slopes and 

 ridges near the coast of Mendocino and Sonoma Counties, California. Type locality: "rocky summits of the more 

 elevated parts of Bodega Point, Sonoma County." 



15. Convolvulus longipes S. Wats. Piute Morning-glory. Fig. 3867. 



Convolvulus longipes S. Wats. Amer. Nat. 7: 302. 1873. 



Stems erect, much-branched, glabrous throughout, the slender branches sometimes twin- 

 ing, 4-10 dm. high. Leaves narrowly linear to linear-lanceolate, at least the lower with promi- 

 nent linear or lanceolate hastate lobes, the uppermost reduced to narrow mostly auriculate 

 bracts; petioles slender, 1-2.5 cm. long; peduncles slender, 8-15 cm. long, bearing a single or 

 rarely 2 pedicellate flowers at the summit ; bracts linear or linear-subulate, attached about their 

 own length below the calyx or sometimes more remote, occasionally one or both absent ; sepals 

 chartaceous, broadly oval, rounded and mucronate at the apex, the outer 6-7 mm. long, shorter 



