434 ROSACA/E. Horkelia. 



of Druiuniond exactly acconis witli Altaic spccinn'iis, some of the forms of 

 which we cannot well distinguish from Mr. Nuttall's plant. 



19. HORKELIA. Chrmi. S^' Schlecht. in Linntea, 2. p. 2G. 



Calyx campanulate, 5-cleft, and with 5 alternate segments or bracteoles. 

 Petals 5, inostly longer than the calyx, obovate or cuneiform, unguiculate. 

 Stamens 10, in 2 series : filaments shorter than the calyx-segments, dilated, 

 often deltoid, persistent ; those opposite the petals rather smaller and inserted 

 lower down. Ovaries numerous, fixed by their middle to the dry conical 

 villous receptacle : styles filiform, terminal, articulated with the ovary by a 

 broad base, at length deciduous : stigmas obtuse. Achenia smooth, rcniform- 

 ovate. Seed suspended, obovate, with a thick and firm brownish testa. 

 Colyledons oval, flat : radicle slightly incurved, superior. Perennial 

 herbs, Avith somewhat the aspect of Potentilla. Leaves pinnate or pinnately 

 parted : the leaflets incised, the upper stipules and bracts mostly in- 

 cised or niultifid ; the lower stipules mostly adnate to the petiole ; the upper 

 ones usually free. Flowers (white or rose-color) in crowded or subcapi- 

 tate cymes. 



Tlie filaments which are opposite the petals fall away with them : the others 

 are wholly persistent. 



1. H. Californica (Cham. & Schlecht.) : villous-pubescent, somewhat 

 viscid at the summit ; radical and lower caaline leaves about 11-foliolate ; 

 leaflets roundish-cuneiform, deeply incised and toothed ; stipules incised or 

 pinnatifid ; cyme expanded, loose, the flowers all pedicellate; segments of 

 the caljx large, nearly twice the length of the oblong petals; the outer or 

 bracteolar ones ovate-oblong, mostly 2-3-toothed, equalling or ratlier longer 

 than the triangular-lanceolate acute inner or true ones. — Cham. ^Schlecht. ! 

 I. c. H. grandis, Hook. ^* Am. hot. Beechey, siippl. p. 339. 



St. Francisco, California, Chamisso! Douglas. — Root thick. Stem 1-2 

 feet high. Leaflets mostly somewhat alternate, as is often the case in all the 

 species. Flowers about twice as large as those of H. congesta: segments of 

 tlie calyx foliaceous. — We have not examined the specimens of H. 

 grandis, Hook. SfArn. ; but from a comparison of their description with the 

 plantof Chamisso, are satisfied that it is identical with this species. In a 

 cymose inflorescence of this kind, no great dependence is to be placed on the 

 length of the alar peduncles ; and besides, those of the lower flowers are of 

 considerable length in Chamisso's plant. 



2. H. congesta (Hook.) : lower part of the stem and the 13-1.5-foliolate 

 leaves very hirsute with long hairs, nearly glabrous at the summit ; leaflets 

 narrow, cuneiform, incised chiefly at the apex; stipules almost filiformly 

 many-parted ; flowers more or less crowded on the branches of the large 

 dense, or at length spreading, fastigiate cyme ; peduncles and pedicels gland- 

 ular; bracts very short, 3-5-parted ; bracteolar calyx-segments lanceolate, 

 much shorter and smaller tlian the triangular true ones, mostly entire ; petals 

 very broadly cuneiform, longer than thie calyx. — Hook. ! hot. mag. t. 2880, 

 Sf ji. Bor.-Am. I. p. 196 ; Hook. S^- Am. ! hot. Beechey, suppl. p. 339. H. 

 hirsuta, Lindl. ! hot. reg. subfol. 1997. H. pilosa, Ntitt..' mss. 



Interior of Oregon, and on the low hills of the Umtqua River, lat. 41°-42°, 

 Douglas ! Plains of the Wahlamet, Nuttall .' — Root thick, fusiform. Stem 



