Osmorhiza.] UMBELLIFER^E. 271 



mvoinceWumfoliolisplurimis wtegris aut trifidis, Flores albi aut fldvi, centralis smpe car- 

 710SUS atro-purpureus sterills. DC, 



1. D, microphyllus ; caule pilis mollibus retrorsis villoso, foliis villosis bipinnatisectis 

 segmentis in lacinias lineares sectis, invoiucri foliolis plnnatifidis umbellam parvam confertam 

 sub£equantibus aculeis fructus ovati latitudinem subeequantibas apice distincte glochldatis. 

 DC.—'' PrtsL in Herb. HcBnk,'' De Cand. Prodr, v. 4. p. 213. 



Hab. Nootka-Sound. H(Bnk. Straits of De Fuca. Dr. Scouler. Rocky places of the Grand Rapids of 

 the Columbia, and ou the plains of the Multnomak River. DouqJqs, 



SuBORD. II. CAMPYLOSPERMiE. Albumen intm sidco longltudinali ob margines involutos 



notatum, (PaucijugatcB.) 



Trib. IX. ScANDiciNE^, Fructus a latere compressus aut contractus, elongatus swpe 



rostratus, 



26. OSMORHIZA. Rajin, 



Calycis margo obsoletus. Petala obovata vix ac ne vix cmargliuita acumine brevissimo 

 inflexa. Fructus elongatus basi in caudam attenuatus solldiis acuto-angulatus, sectione trans- 

 versal! subteres. Mericarpia angulis subsulcatis luspidis, jugis 5 acutis, comniissura sulcata, 

 valleculis planis evittatis. Semen teres, anguste involutum, tubo calycino multo brevius. 

 Carpopodiiim semibiiiduni. — Herbse Americanm perennes. Radices fusiformes odoratce* 

 Caulis ramosus bipedalis. Folia biternatisecta, segmentis late ovato-lanceolatis inciso-dentatis, 

 Involucrum 2-3 phyllnm^ involucella scepius ^-phylla, folioUs utrinsque lanceolatis ciliatis, 

 Flores albi, centrales umbellulae masculi, exteriores fertiles, DC. 



1, 0, longistylis; glabra v. subliirsuta, stylis elongatis siibulato-filiformibus fructibus cla- 

 vatis, involucris persistentibus (Tab. XCVI.) — De Cand. Prodr. i\ i.p. 232. — Myrrhis lon- 

 gistylis. Torrey, FL of Uii. St. v. 1. p. 310. — Uraspermum Claytoni. Nutt. Gen. Am, v. I. 

 p, 193. Bigel, FL Bost ed, 2. p. 112. — Myrrhis Claytoni, Spr. Sp. Umbell.p. 129. /. 3./ 6. 



Radix crassa, fusiforrais, ramosa, Atiisi odore. Caulis erectus, ramoitus, tereti-s trial us, sesquipedalis ad 

 pedaleni. Folia inferiora lono^e petiolata, superiora sessilia, bitematim secta, segmentis seu foliolis 2-3- 

 uncialibns, ovatis subcordatisqiie, subacuminatis, pinnatifido-lobatis, serratis, glabris, vel mag^is minusve 

 hirsutis. Umbell<B umbellulceque pauci-radiatfe, diraricatae. Invohicra involuccJIoque e foliolis subqiun- 

 que, lauceolato-acuminatis, ciliatis, demiun reflexis, persistentibus. Flores albi. Calj/x obsoletus. Petala 

 obcordata, lacinula inflexa, Styli erecto-divergentes, germinis longltudinem fere dimidiam lequautes. 

 Fntctus oblongus obtusus inferne valde attenuatus seu omnino clavatus, stylis longis erectis coronatus, 

 lateraliter compressiis, jugis 5 acutis, appresso-hispidis, duobus lateralibus marginantibus. Vitt(B nullae 

 Semen antice profunde sulcatum. 



Hab. Throughout Canada, from Lake Huron. Dr, Todd. Quebec. Mrs. Percival. Mrs. Sheppard, 

 Lady Dalhousie ; to the SaskatchaHan, Dr. lUchardson. I>)-ummond. Shady woods, North-West America, 

 in the lat. of the Columbia. Douglas. — Much confusion lias existed, and I fear still exists, respectini,^ the two 

 North American species of Osmorhiza^ both of which, by the less recent authors, have been considered as 

 one, under the name of Myrrhis Claytoni. They were separated by Dr. Torrey, and Dr. Bigolow, in their 

 respective publications which appeared in the same year, 1824: so that it Is hard to say which has the 

 priority in regard to date. I have preferred the names given by De Candolle, as the most expressive of the 

 essentially distinguishing characters. 



