164 ROSACEAE 



feet, common; Sierra Nevada from 'I'lilaic Co. to Mt. Shasta, 1500 to 4500 feet, at 

 scattered stations. North to Britisli Columbia. Apr.-Jiine. 



Locs. — Coast Kanges: Alma, Santa Cruz Mts., Pcndlctnn 722; Belmont, San Mateo Co., 

 Davy 799; Borkeley, Jepson 819:i; Paper Mill Creek, Marin Co., Jcpson 8281 ; Santa Rosa, Heller 

 5G47; Howell Mt., Jepson 13,847; Jackson Valley, Mendocino Co., Jepson; Long Valley, Mendo- 

 cino Co., Jcpsnn; Ilydesville, Humboldt Co., Tracji 3270; Browns Creek, Trinity Co., Yates 389; 

 Sisson, Siskiyou Co.j Jepson 13,845 ; Trinidad, n. ilumboldt Co., Geo. Parrish ; Crescent City, Del 

 Norte Co., Parks 3192. Sierra Nevada : Dorst Creek, Tulare Co., IF. /'>v 4 ; Millwood, Fresno Co., 

 ace. Hopping; Italian Bar, Tuolumne Co., Jepson 6368; betw. Sheep Kanch and Mountain Ranch, 

 Calaveras Co., Davy 1597; Jackson, Amador Co., Hansen 236; Little Chico Creek, Butte Co., 

 E. M. Ajistin; Ash Creek, Mt. Shasta, M. S. Baker. 



Refs. — Physocarpus capitatus Ktze. Rev. Gen. PI. 1:219 (1891) ; Jepson, FI. W. Mid. Cal. 

 ed. 2, 204 (1911), Man. 478, fig. 472 (1925). Spiraea capitata Pursh, Fl. 342 (1814), type from 

 "North-west Coast" (of America), 3fen3'i>s. Neillia capitata Greene, Pitt. 2:28 (1889). Opulaster 

 capitatus Ktze. Rev. Gen. PI. 2:949 (1891). Opxdastcr opulifolivs var. capitatus Jepson, Fl. W. 

 Mid. Cal. 276 (1901). Spiraea opulifolia var. tomentella Ser. ; DC. Prod. 2:542 (1825), type loc. 

 not stated. Spiraea opulifolia var. b. Hook. Fl. Bor. Am. 1:171 (1834). Physocarpa tomentosa 

 Raf. New Fl. 3:74 (1838). S. opiUifolia var. mollis T. & G. Fl. 1:414 (1840). Neillia opulifolia 

 B. & W. Bot. Cal. 1:171 (1876), in part. N. opulifolia var. mollis B. & W. l.e. 



2. P. alternans J. T, Howell var. panamintensis Jepson comb. n. Shrub 1 to 

 3 feet high; leaf -blades pubescent above, li/4 to 2 lines long. 



Rocky montane slopes, 7000 to 8500 feet : Panamint Range. June-July. 



Var. annnlatus Jepson comb. n. Inside of calyx-tube with a ring of hairs near the top. — 

 "White Mts. 



Refs.— Physocarpus alternans J. T. Howell, Proc. Cal. Acad. 20:130 (1931). Neillia 

 monogyna var. alternans Jones, Zoe 4:42 (1893), type loc. Schell Creek Mts., Nev., Jones. Var. 

 PANAMINTENSIS Jcpson. P. alternans subsp. panamintensis J. T. HoAvell, I.e. 20:132, type loc. 

 saddle betw. Johnson and Surprise canons, Panamint Range, J. T. Howell 3942. Var. annulatus 

 Jepson. P. alternans subsp. annulatus J. T. Howell, I.e. 20:133, type loc. Wyman Creek, White 

 Mts., Duran 1682. 



3. SPIRAEA L. 



Shrubs with simple leaves, short petioles and no stipules. Flowers white or 

 rose-color, small (about % to 1^ lines long), numerous, crowded, in terminal 

 corymbs, panicles or spikes. Stamens 10 to 50, much-exserted. Pods glabrous in 

 ours, commonly 5, not inflated, few- to several-seeded. — Species about 40, north 

 temperate zone. (Greek speira, a band, wreath. ) 

 Erect shrubs ; leaves not in rosettes, deciduous ; follicles dehiscent ventrally. 



Flowers rose-pink, in narrow panicles; leaves white-tomentose beneath 1. S. douglasii. 



Flowers pale purple, in corymbs; leaves glabrous or minutely puberulent 2. S. densiflora. 



Prostrate shrubs, somewhat herb-lilte, with evergreen leaves in close dense rosettes; flowers white, 



in dense cylindrical spikes; follicles dehiscent both ventrally and dorsally 



3. S. caespitosa. 



1. S. douglasii Hook. (Fig. 159.) Erect, 2 to 6 feet high, with stoutish 

 branches and reddish-brown bark; leaf -blades oblong, serrate at apex, green above, 

 white-tomentose beneath, 1 to 3 (or in shade even 4) inches long; panicles narrow, 

 usually elongated, 2 to 5 inches long; calyx-lobes mostly reflexed; petals ovate. 



Valley flats, meadows and along streams: Sierra Nevada from Plumas and 

 Butte Cos. to Modoc Co., 2500 to 5000 feet; North Coast Ranges from Humboldt 

 Co. to Siskiyou and Del Norte Cos., 25 to 5000 feet. North to British Columbia. 

 July-Aug. 



Locs. — Northern Sierra Nevada : Engels, Light Creek, Plumas Co., Jepson 8009 ; Prattville, 

 Plumas Co., E. H. Piatt; Jonesville, Butte Co., Copeland 374; Mineral, Tehama Co., J. Grinnell; 

 Forestdale, sw. Modoc Co., M. S. Baker. North Coast Ranges : betw. Scotia and Fortuna, M. S. 

 Baker 5; betw. Eureka and Areata, Humboldt Co., Jepson 1924; Stuarts, Trinity Co., H. S. Yates 

 497; Sisson, Siskiyou Co., Jepson 13,855; betw. Igerna and Weed, Siskiyou Co., Heller 8085; 

 Log Lake, Shackelford Creek, Siskiyou Co., Butler 284; Crescent City, Jepson 9395a. 



Refs. — Spiraea douglasii Hook. Fl. Bor. Am. 1:172 (1834), "Northwest Coast of America 

 about the Columbia and Straits of Juan de Fuca," Douglas; Jepson, Man. 478 (1925). S. noile- 

 ana Hook. Bot. Mag. t. 5169 (1860), cultivated from Douglas seed, type locality not stated. S. 

 douglasii var. nobleana Wats. Bot. Cal. 1:169 (1876). 



