172 



ROSACEiE. [Spircea. 



of Kotzebue's Sound. Zot/ arid Collie in Captain Beechei/s Collection. — This is, according^ to all accounts, a 

 Tcry variable species. Of the larger and sharp-leaved vmiety, (5'. ulmifolia. Scop.) a g-ood figure is given in the 

 Bot. Reg., and that is, as Mr. Lindley justly observes, the original S. chammdryos foliis of Amman, St. Rar. 

 p. 190. 



Sect. III. Spiraria. Ser. 



4. S. betulifolia; foliis late ovalibus breve petiolatis glabris superne prsecipue inciso- 

 serratis sublobatis subtus pallldis, corj'inbis compositis latis glabris foliolosis, florlbus 

 niimerosissimis (parvis), ovariis 5 glabris. — Pall, FL Boss, t 16. Purshy Fl, Am* v. 1. p. 

 342? Wats, Dendrol, t, 67. (Jig. bona,) De Cand. Prodr. v, 2. p, 544. — S. lucicla. Douglas, 

 MSS, apud Hort, Soc, Lond, — ^. foliis majoribus magis lobatis subtus pallidioribus. 



Hab, a. and /S. Vallies of the Rocky Mountains, in lat. 52*^-54°. Drummond. In the subalpine regions 

 of Mount Hood, and in the Blue Mountains, near Lewis and Clarke's River, North -West America. Douglas. 

 — Stems 1-2 feet high; branches erect, red, glabrous, as is every part of the plant. Leaves 2-3 inches long, 

 membranaceous. Rowers very small and numerous, crowded, forming a flat, broad, compoimd corymb, 

 white, (^Douglas,) yellowish when dry. This agrees tolerably well with Pallas' figure of the Siberian *S'. 

 betulifolia, as far as can be judged from the fructified state of the plant, w hich is alone given in the Flora 

 Rossica. The leaves and inflorescence in IVfr. Watson's representation are very characteristic of our plant. 

 Muhlenberg's and Rafinesque's >S'. corymbosa (see Torrey's Fl. v. 1. p. 483,) seems to differ from this prin- 

 cipally in being slightly downy. 



5. S, salicifoUa; glabriuscula, foliis lanceolatis argute subduplicato-serratis, lobis calycinis 

 triangularibus patulis, raceinis elongatis, floribus densis, carpellis 5 glabris. Linn, Sp. PL 

 p, 700. — /3. floribus albis.— S. salicifolia. Mich. Am, v. I. p. 293. Pursh, FL Am. v. 1, p. 

 340. Torrey., FL of Un. St, v. I. p. 481. Rich, in FrankL \st Journ. ed. 2. App. p. 19. 

 De Cand. Prodr. v. 2. p. 544. Elliott, CaroL v.l,p, 560.— S. alba. Ehrh.—BigeL FL BosL 

 ed, 2.p, 197. Wats, DendroL t. 133. — S. salicifolia, y. paniculata. Ait. Hort, Kew, 



Hab. /S. Throughout Canada, and as far north as the Saskatchawan. Newfoundland. Sir Alexander 

 Cochrane. 



6. S. tomentosa; ramis pedunculisque ferrugineo-tomentosis, foliis ellipticis duplicato- 

 serratis sublobatis subtus ferrugineo-tomentosis, panicula confertiflora attenuata, floribus 

 parvis, staminibus corolla rosea vix longioribus, lobis calycinis triangularibus reflexis, carpellis 

 5 tomentosis.— Zzww. Sp. PL p. 701. Mich. Am. v. \. p. 293. Pursh, Fl, Am, v, 1. jo. 341. 

 Torrey, FL of Un. St. v. I, p, 4>8l. BigeL Fl. Bost. ed, 2. p. 197. Elliott, CaroL v.l.p, 560. 



Hab. Canada, (Michaux, Mrs. Percival, Mrs. Sheppard,) and as far as Lake Winipeg. Dr. Michardson, 

 Mr. Dj^ummond. 



7. S, Douglasii; ramis pedunculisque pubescentibus, foliis ellipticis superne grosse 

 inoequaliter serratis subtus incano-tomentosis, panicula confertiflora oblonga obtusa, floribus 

 parvis, staminibus corolla rosea duplo longioribus, lobis calycinis triangularibus reflexis, 

 carpellis 5 glaberrimis nitidis. 



Hab. North-West coast of America, about the Columbia and the Straits of de Fuca. Douglas, Dr. 

 Scolder. —"Yh^^ is unquestionably different from S. tomentosa, being much lai^er in the branches and leaves, 

 with a white (never ferruginous) tomentum. The leaves are serrated only in their upper half, and there 

 very coarsely ; the panicle is never attenuated, but very obtuse, the flowers are smaller, the stamens longer, 

 and the capsules are quite glabrous and shining. 



