ROSACEA. 57 



1. A. TUlgaris, Raf. Sylv. Tell. 152 (1838); J. sib ester, Kost. {18UI 

 Spira'a Aruncus, Linn. Sp. PI. 490 (1753). Glabrous, branching, 8—6 

 ft. high : leaves 12 — 18 in. long : leaflets 2 — 5 in. long, ovate or lance- 

 olate, acuminate, often with a pair of lobes at base, sharply and doubly 

 serrate-toothed, short-petiolulate, thin, sometimes pubescent beneath : 

 panicle large, compound, pubescent : fl. a line broad, nearly sessile : fila- 

 ments elongated : carpels 3-5, glabrous.— In woods of the Coast Range 

 northward. 



4. BASILIMA, Rafiuesqne. Unarmed shrub with stout branches, 

 smooth dark-colored bark, coriaceous bipinnately dissected stipulate 

 leaves, and terminal panicles of middle-sized white flowers. Calyx 5- 

 lobed. Petals 5, rounded, imbricate m bud. Stamens qc , perigynous. 

 Pistils 5, becoming coriaceous several-seeded carpels which are opposite 

 the calyx-lobes connate at base, but ultimately 2-valved by a tardy second 

 dehiscence along the dorsal suture. Seeds with distinct albumen. 



1. B. Millefolium, Greene. Torr. Pac. R. Rep. iv. 83 t. 5 (1857), under 

 Spinea : Chamxba'iaria Millefolunn, Maxim.: Sorbaria Millefolium, 

 Focke in Engl. & Prantl. Rigidly erect and widely branching, 3 — 8 ft. 

 high : leaves 2 in. long or less, with crowded pinnae and minute pinnules ; 

 stipules small, free, entire ; the growing foliage, ijiflorescence, and even 

 the carpels more or less densely stellate-tomentose : fl. % in. broad : 

 fruit small, little exserted. — Eastern slope of the Sierra Nevada and east- 

 ward, in dry rocky places. Of special interest as representing in America 

 the otherwise exclusively Asiatic genus, Basilima (more recently named 

 Schizono'us Lindl., and still later Sorbaria Maxim.), of which it has all 

 the characters, though scarcely the habit. The foliage is resiniferous 

 and fragrant as in the next genus. 



5. CHAM^BATIA, Beniham (Tar-Bush). A low unarmed evergreen 

 shrub with smooth bark, coriaceous tripinnately dissected stipulate leaves, 

 and terminal few-flowered cymes of rather large white flowers. Calyx 

 with turbinate tube ani deeply 5-lobed limb. Petals 5, obovate, imbri- 

 cate in bud. Stamens X), perigynous. Pistil 1, simple, becoming a cori- 

 aceous obovoid large achene. Seed with scant albumen. 



1. C. foliolosa, Benth. PI. Hartw. 308 (1849) ; Torr. PI. Frem. 11. t. 6 : 

 Hook. BDt. Mag. t. 5171. Dwarf, rather slender, wtth wide-spread 

 branches, 1—2 ft. high, tomentose-pubescent and resiniferous, the calyx 

 only somewhat glandular-hispid : leaves obovate-oblong, 2 in. long ; ulti- 

 mate pinnule-5 minute, crowded; stipules small, linear, entire: petals 

 3 —4 lines long : achene nearly filling the persistent calyx, abruptly 

 acute. — Western slope of the Sierra from Nevada Co. southward to 

 Mariposa, in pine woods at an elevation of 3,000 to 6,000 ft. Very resiu- 

 ou; and heavy-scented : commonly called Tar-iveed. 



