PURSLANE FAMILY 135 



10. Lewisia rediviva Pursh. Bitterroot. Fig. 1653. 



Lewisia rediviva Pursh, Fl. Amer. Sept. 358. 1814. 

 Lewisia alba Kell. Proc. Calif. Acad. 2: 115. 1861. 

 Lewisia minor Rydb. N. Amer. Fl. 21 : 327. 1932. 



Perennial with stout branching root and short caudex, 1-3 cm. broad. Leaves basal, 2-5 cm. 

 long, obtuse, broadly linear or narrowly clavate, very fleshy with a widened hyaline base; stems 

 1-3 cm. high, 1-flowered with 5-8-whorled, subulate, scarious bracts at the base of the pedicel, the 

 flower and pedicel readily disjointing in age ; sepals 4-8, oval, imbricated, rose-colored or white, 

 1.5-2.5 cm. long; petals 12-18, rose-colored, sometimes white, 2-2.5 cm. long; stamens 35-50; 

 ovules 25-40 ; capsule 5-6 mm. high ; seeds 9-25, 2 mm. long, dark, shining. 



Rocky soil or rock crevices, Arid Transition Zone; British Columbia to southern California, east to Mon- 

 tana, Colorado, and Arizona. Type locality : Bitterroot River, Montana. March-June. 



11. Lewisia disepala Rydb. Two-Sepaled Lewisia, Yosemite Bitterroot. 



Fig. 1654. 



Lewisia rediviva var. yosemitana K. Brandg. Proc. Calif. Acad. II. 4: 89. 1894. Not L. yosemitana Jepson. 

 Lewisia disepala Rydb. N. Amer. Fl. 21 : 328. 1932. 



Perennial with branching fleshy root and short caudex 5-8 mm. in diameter. Leaves fleshy, 

 linear to clavate, obtuse, 8-20 mm. long; stems shorter than the leaves, 1-flowered with 2-3 ovate 

 scarious bracts, 2-3 mm. long; pedicels 1-2 mm. long, jointed above the bracts and readily dis- 

 jointing; sepals entire, ovate, rounded, sometimes emarginate at the apex, 7-8 mm. long; petals 

 5-7, white or pinkish, variable in length and width, 13-18 mm. long ; stamens about 15, shorter than 

 the petals; ovules many; capsule ellipsoid; seeds 11-15, not strongly compressed, 1.5 mm. long. 



Rocky soil, Hudsonian Zone; summits around Yosemite Valley, Sierra Nevada. Type locality: summits 

 around Yosemite Valley, California. June-July. 



12. Lewisia brachycalyx Engelm. Southern Lewisia. Fig. 1655. 



Lewisia brachycalyx Engelm. ex A. Gray, Proc. Amer. Acad. 7: 400. 1868. 

 Lewisia bracltycarpa S. Wats. Bot. Calif. 1: 79. 1880. 

 Oreobroma brachycalyx Howell, Erythea 1: 31. 1893. 



Perennial with large branching root and short thickened caudex. Leaves many, 3-6 cm. long, 

 broadly oblanceolate, longer than the inflorescence ; stems many, 2-5 cm. long, floral bracts 

 resembling sepals and closely subtending them, the flowers therefore sessile or nearly so ; sepals 

 ovate, acute, entire, 6-8 mm. long; petals 5-9, white, 12-18 mm. long; stamens 12-15; capsule 

 ovate, 8-9 mm. high, seeds 40 or more, black and shining. 



Marshy places, Transition Zone; Utah to Arizona and New Mexico and the San Bernardino and Cuyamaca 

 Mountains, southern California. Type locality: western New Mexico. May-June. 



13. Lewisia Kelloggii K. Brandg. Kellogg's Lewisia. Fig. 1656. 



Lewisia Kelloggii K. Brandg. Proc. Calif. Acad. II. 4: 88. 1894. 



Oreobroma Kelloggii Rydb. N. Amer. Fl. 21 : 326. 1932. 



Lewisia yosemitana Jepson, Man. Fl. PI. Calif. 352. 1923. Not L. rediviva var. yosemitana K. Brandg. 



Fleshy perennial with stout root and short caudex. Leaves many, basal, spatulate, 1-4 cm. 

 long, noticeably transverse wrinkled on drying; petiole widened, thick; stems jointed at the base, 

 not readily disjointing, 1-flowered, 1-5 cm. high, usually shorter than the leaves, bracts immedi- 

 ately below the sepals and similar to them ; sepals ovate-lanceolate, acute at the apex, glandular- 

 denticulate on the margin, the glands often dark; petals 7-11, white, 8-15 mm. long; stamens 

 15-20; ovules 12-18; capsule ovoid, thin-walled; seeds 12-15. 



Sandy or gravelly soil, Canadian and Hudsonian Zones; Sierra Nevada from Plumas County to Mariposa 

 County, California. Type locality: Cisco, California. June-July. 



8. PORTULACA [Tourn.] L. Sp. PI. 445. 1753. 



Low succulent herbs with alternate or partly opposite leaves and terminal sessile 

 flowers. Sepals 2, united below and partly adnate to the ovary. Petals 4—6, inserted on 

 the calyx, 7 to many. Style deeply 3-9-cleft or -parted. Capsule membranaceous to cori- 

 aceous, many-seeded, circumscissile near the middle. [Latin, in allusion to the purging 

 qualities of some species.] 



A genus of about 100 species of the tropical and subtropical regions of both hemispheres. Type species, 

 Portulaca oleracea L. 



1. Portulaca oleracea L. Purslane. Fig. 1657. 



Portulaca oleracea L. Sp. PI. 445. 1753. 



Fleshy, prostrate, glabrous annuals with branches 9-20 cm. long. Leaves alternate, cuneate 

 or obovate, 5-25 mm. long, clustered at the ends of the branches ; flowers sessile, 2-6 mm. broad ; 

 sepals keeled, acute ; petals emarginate, yellow, opening only in the sunshine ; style 4-6-parted ; 

 capsule 4-8 mm. long; seeds black, finely rugose, about 0.5 mm. long. 



In cultivated fields and waste places throughout Washington, Oregon, and California; naturalized from 

 Europe. Type locality: Europe. May-Oct. 



