172 ROSACEA. kunzia. 



CEROOCARPUS. 



K. tridentata Spreng. 1. c. Purshia tridentata DC. A shrub or small 

 tree 2-10 feet high, with brown or grayish bark, the young branches and 

 branchlets pubescent: stipules connate at base, setaceous; leaves cuneate- 

 obovate, 3-12 lines long, 3-lobed at the apex, attenuate at base to a thick 

 petiole, white-tomentose beneath, green above: flowers nearly sessile; 

 calyx 2-4 lines long, densely canescent-tomentose, with or without some 

 glandular hairs below, the oblong obtuse lobes shorter than the tube; 

 petals spatulate-obovate, unguiculate, 3-5 lines' long, exceeding the calyx- 

 lobes : carpels oblong, densely pubescent, striate, attenuate at each end, 

 4-6 lines long, exserted. Common on rocky hillsides and gravelly or sandy 

 plains, Brit. Columbia to California and the Rocky Mountains. 



6 CERCOCARPUS H. B. K. Nov. Gen. vi, 223 t. 556. 



Small trees or shrubs with alternate leaves, small wholly ad- 

 nate stipules and axillary or terminal inflorescence. Tube of 

 the calyx cylindrical, long and pedicel-like, more or less persis- 

 tent, the limb short, campanulate, 5-lobed, without bractlets, 

 deciduous. Petals none. Stamens 15-25, inserted in 2-3 rows 

 on the limb of the calyx ; filaments short ; anthers oval or 

 rounded deeply emarginate or cleft at each end. Ovary solitary, 

 free, with a single erect ovule : style terminal, villous : stigma 

 capitate. Carpel linear-oblong, caudate with the long persistent 

 plumose style which is more or less enclosed in the slender per- 

 sistent tube of the calyx. Seed with a membranous testa and no 

 albumen. Cotyledons long and linear. 



* Leaves persistent, small, entire, thick-coriaceous with revolute 

 margins, 1-nerved. 



C. ledifolius Nutt. T. & G. Fl. i, 427. A small tree or shrub 6-15 feet 

 high with moderately straight rigid branches : leaves lanceolate or oblong, 

 acute, glandular apiculate, dark green and usually glabrous above, tomen- 

 tose beneath, attenuate below to a thick petiole, 6-18 lines long, mid- 

 nerve prominent: flowers sessile, 3 lines in diameter, tomentOse; limb of 

 the calyx 2 lines long, the oblong-obtuse lobes longer than the throat, 

 tube becoming 3-5 lines long : tails of the achenes at length 2-3 inches 

 long. In mountainous districts, eastern Oregon to California and the 

 Rocky Mountains. 



C. intricatus Watson Proc. Am. Acad, x, 346. A rigidly and intri- 

 cately much branched shrub, 1-6 feet high with ashy-gray bark : leaves 

 lanceolate or apparently linear by the involution of the margins, silky- 

 pubescent both sides or glabrate above, acute, apiculate, sessile, 5-10 lines 

 long: flowers sessile; tomentose; limb of the calyx 2 lines in diameter, 1-2 

 lines long, the short triangular lobes not half as long as the throat, the 

 persistent tube becoming 2 lines long: tails of the achenes 1-2 inches 

 long. On dry hillsides along streaiiKS, John Day valley eastern Oreg< n to 

 Nevada and California. 



* * Leaves deciduous, rather large, the margins not involute, pin- 

 nately veined. 



C. betulwfolius Tlook. 1. c. t. 322. C.parvtfolius of recent authors not 

 Nutt. A shrul) or small tree 2-15 feet high with gray thin flaky bark and 

 long slender spreading or recurved branches: leaves obovate or oblong, 

 with emirate base, obtuse, coarsely serrate above the middle, green but 

 finely pubescent above, densely white tomentose beneath, L-2 inches long- 

 on short petioles, conspicuously veined: flowers on rather slender pedicels, 

 tomentose, limb of the calyx 3-4 lines in diameter, the triangular obtuse 

 lobes about equalling the throat; the tube becoming 4-6 lines long, ob- 



