Spir^a.] ROSACE.E. 



171 



Section of a flower, some of the stamens and petals beings removed j Jif/. 5, Back view of a stamen; Jig. 

 6, Front view of do.; ^(/. 7, Pistil; Jig. 8, Pistil laid open to show the embryo; Ji(/. 9, Capsule «itli 

 its persistent calyx, natural size; Jig. 10, Capsule, magnijied; Jig. 11, Capsule laid open to show the 

 position of the seed; Jig, 12, Seed; Jig. 13, Transverse section of do.; Jig. 14, Embryo: — all but fi*^. 

 1 and 9, magnijied. 



4. SPIR^A. Linn. 



CaL 5-fidus persistens. Stam. 10-50 cum petalis toro calyce adhncrentc inscrta. CarpcUa 

 1-00, distiiicta, rariterbasi coalita, brevi apiculata, sessiliararo stipitata. Sem, 2-6, suturae 

 internae affixa, exalbmninosa. Enibryo inversus, cotylcdouibus craisiusculiii. — Fruticcs ln~ 

 ermes vel herbaj perennes. Rami alternL Folia altcrna simplicia rai'o decomposifo-pinnati- 

 secta, nevv'is penncUis vel ternato-palmatis, Flores albi aut ruhicundi minquam JiavL DC, 



Sect. T. Physocarpus. CamL 



1. S,opulifoUa; foliis cordatis trilobis inciso-serratis petiolatis, corymbis liemlspliaericis 

 multifloris, pedicellis gi'acilibus longis, carpellls (3 v, 2) calyce triplo majoribus iiiflutis. 

 Linn, Sp. PL p, '702, Mich, Am. v,\, p. 293. Pursh, FL Am, v, 1. p. 342. FMioff, Carol, 

 v.l.p, 560. Torrey, FL of Un, St, v, I. p. 482. De Cand. Prodr, v, 2, p, 542.— «. foliis 

 pedicellisque glabris, calycis marginibus soluminodo pubcsceiitibus. — S. opulifolia. «. Ser, — 

 A. foliis juiiioribus subtus pedicellis calycibusque pubescenti-tomentosis. — S. opulifolia. d- 

 tomentella. Ser, — S. capitata. Pursh^ Fl, Am, v. I, p, 342. Be Cand. Prodr, v, 2. p, 542. — 

 y. carpellis 2 pubescenti-tomentosis. — S. monogyna. Torrey in PL of Rock, Mount /;. 194? 



Hab. a. Throughout Canada : from Lake Huron (Dr. Todd) to the Saskatchawau. Dr, Richardson^ 

 I)rummond.—e>. Fort Vancouver, {Mr. Menzies, Dr. Scolder,) and upon rocky banks of streams near the 

 Grand Rapids of the Columbia. Douglas.— y. Kettle Falls of the Columbia. Douglas.— 't)\e hairs of the 

 leaves on var. )3. are beautifully fasciculated. 



r 



Sect. II. Cham^dryon. Ser, 



2. S. hypericifolia ; foliis obovato-oblongis 3^-nerviis integris vel dentatis glabris puber- 

 ulisve, nervis pinnatis, corymbis pedunculatis aut unibellis sessilibus, pedicellis glabris pu- 

 berulisve, sepalis adscendentibus. Ser, —Linn, Sp, PL p, 701. Pursh, FL Am, v, L p, 341. 

 Torrey, FL of Un, St. v, 1. p. 480. De Cand, Prodr. v. 2. p, 543.-/3. Plukcnctia. Ser, 

 foliis integerrimis glabris, corymbis sessilibus. 



Hab. ^. Canada. Pursh.—l am unacquainted T^ith this, nor, though stated on the same authority 

 to be found in the evvamps of New York, has Dr. Torrey ever seen an American specimen. It is probable 

 that this, like so many of the species of this section, is exclusively a native of the Old World. The S, capi- 

 tata, placed here by M. Serin^e, unquestionably belongs to the ilrat section, and to S. opulifolia. 



3. S, chamcBdrifoUa ; foliis ovatis ellipticisve in^qualiter serratis rarius sublobatis glabri- 

 u-culis, corymbis hemisphiEricis pedunculatis, pedicellis lobisque calyciiiis reflcxis pubescen- 

 tibus. 'unn. Sp, PL p. 701. Pursh, FL Am. v. \, p, 343. De Cand. Prodr, v, 2. p. 542.— 

 /3. foliis ellipticis obtusis glabris vel subpubescentibus.— S. chamfrdrifolla. PalL FL Bo.^s. p. 



32. t XV. {fig. med,) 



Hab. North-West coast of America, (but surely not « in Canada,") Pursh.— {i. Sledge Tslnnd in 



mainlaiid 



Y 2 



