588 SAXIFRAGACEiE. Astilbe. 



panicle loose ; petals resembling the filaments. — HooJc. ! fl. Bor.-Am. 1. p. 

 238, t. 81. 



Rocky Mountains near the source of the Oregon, and at Portage River, 

 Drummond ! — The panicle in the above-cited figure is more compound than 

 in our specimens, and the leaves less deeply lobed. 



_ A - 3. T. trifoliata (Linn.) : hirsutely pubescent or partly glabrous ; stem 

 2-3-leaved (rarely naked, ex Hook.) ; leaves ternately divided or trifoliolate ; 

 the terminal leaflet rhomboid-ovate ; the lateral somewhat trapezoidal ; all 

 incisely toothed ; panicle slender ; petals linear-filiform. — Linn, amcen. 

 acad. 2. p. 351, 8^-spec. 1. p. 406 ; Pursh .' Jl. 1. p. 313; Willd.! spec. 2. 

 p. 659 ; Scringe, in DC. I. c. ; Bongard, veg. Sitcha, I. c. p>- 139; Hook.! 

 jl. Bor.-Am. \. p. 239. T. (Anthonema) rhombifolia, Nutt. ! mss. 



N. W. Coast, Menzies! Norfolk Sound, Eschscholtz ! Sitcha, Bongard; and 

 shady woods of the Oregon, near the coast, Douglas ! Nuttall! Mr. Tolmie! 

 and on the west side of the Rocky Mountains, Drummond. — This species 

 was founded on Siberian specimens ; and Mr. Nuttall suspects the American 

 plant to be a distinct species : but the specimen of Pallas in Willdenow's 

 herbarium is, if we mistake not, identical with ours ; and Bongard remarks 

 that he has compared the American plant with that from Siberia and 

 Sitcha, and finds them wholly the same. He also corrects the mistake of 

 Seringe in comparing the raceme to that of Mitella diphylla. The upper- 

 most leaves are sometimes deeply 3-parted or only 3-lobed ; the others with 

 petiolulate segments or leaflets. Stems often reclined. 



4. T. laciniata (Hook.) : scabrous-hirsute ; stem about 3-leaved ; leaves 

 3-foliolate; the terminal leaflet deeply 3-cleft, the lateral ones 2-cleft; the 

 segments broadly lanceolate, laciniaie-pinnatifid ; panicle loose ; petals fili- 

 form and resembling the filaments. Hook. fl. Bor.-Am. 1, p. 239, t. 77. 



N. W. Coast, Menzies. — Segments of the calyx acute. 



10. ASTILBE. Hamilton, ex Don, prodr. Nepal, p. 210. 



Hoteia, Morr. ^- Decaisne. 



Calyx campanulate, or somewhat obconic at the base, 5- (rarely 4-) 

 parted, somewhat coherent with the base of the ovary ; the segments ovate, 

 erect, imbricate in aestivation. Petals 5 (rarely 4), spatulate, inserted into 

 the base of the calyx (sometimes none ?), marcescent. Stamens 10 (rarely 

 8) ; filaments subulate, exseried : anthers cordate, 2-celled. Ovary 2-celled, 

 with a central placenta : ovules numerous, ascending: styles short, at first 

 united at the base : stigmas obtuse, papillose. Capsule somewhat coria- 

 ceous, 2-celled ; the carpels at length separable and opening longitudinally 

 along the inside. Seeds by abortion few (1-4) in each carpel, scobifonn : 

 testa membranaceous, loose, attenuate at each end. Embryo cylindrical, 

 more than half the length of the abundant fleshy albumen : cotyledons 

 thick, ovate. — Perennial herbs, resembling Spiraea Aruncus. Leaves 2-3- 

 ternately or somewhat pinnately compound ; the leaflets serrate : petioles 

 dilated and stipuliform at the base. Racemes spicate, disposed in a crowded 

 panicle. Flowers small, bracteate, yellowish- white. 



We have drawn the character here given from the flowers of A. decandra, Don, 

 the figure and description of Hoteia Japonica, Morr. ^ Decaisne, and from 

 speciraens of Spiraea barbata, Wall, from Bot. reg. t. 2011, which Lindley (Bot. 



