248 



ARBORETUM AND FRDTICETUiM. 



PAKT I J I. 



26 



Spec. Char. Peduncles 1-flowered, almost equal in length with the leaves. 

 Leaves biternate; Icafiets oblong-lanceolate, acuminated, serrated. Petals 

 emarginate at the apex. (Dun's Mill., i. p. 10.) Siberia. Flowers white. June 

 or July. 17j3 Height 12 ft. 



Varicli/. A blue-flowered variety of this species is men- 

 tioned, in But. Mag., t. 1391. 

 Descriptiun. There is a considerable similarity in this 



to the last, in foliage and habit of growth ; but it is less 



robust and less branchy ; its branches are more ligneous- 



lookmg, and the segments of the leaves longer. The 



calyxes of the flower are white, longer, and with the 



tips rather connivent than spreading. The whiteness 



of the calyxes seems to be partaken of by the bark 



and foliage, as these are of a lighter colour than in A. 



alphia, the calyxes of which are of a blue colour. The 



flowers of A. sibirica are longer than those oi A. alpina 



and perhaps less numerous. 



Geography, Histori/, Sfc. Found in the mountainous 



districts of Siberia, as far as the Eastern Ocean, co- 

 vering the shrubs and untlerwood, much in the same 



manner as Clematis Vitalba does in England. Pallas observes that it 



flowers profusely in June, and that in autumn it delights the e^c with its 



clusters of white feathery seeds. The plant is not ver} common in British 



gardens, and has been chiefly cultivated by Messrs. Loddiges. 



1 3. A. ochote'nsis Pall. The Ochotskoi Atragene. 



Jdentificalion. Don's Mill., 1. p. 10. ; Sweet's Hort. Brit., p. 2. 



Synonymes. ^Itragenu violacea PaW. ; Clematis ochotensis Poir. ; &nA Dec. Prod., \. p. 10. 

 Spec. Char. Peduncles l-flowered. Leaves biternate ; leaflets oblong-lanceolate, acuminated, ser- 

 rated. Petals few, linear. {Don's Hill.) Siberia. Flowers violet From May to July. 1818. Heieht 

 12 ft. 



Description. The plant bears a .strong resemblance to A. siMrica, of which it is probably only a va, 

 ricty. The flowers have four ovate mucronate sepals, which are downy in the margin. Petals none, or 

 sometimes with the outer stamens abortive, a little elongated, and linear. Filaments velvety, a little 

 shorter than the sepals. {Don's Mill., i. p. 10.) 



Geography, History, Sjc. Native of Siberia, towards the'Ochotskoi Sea; and of Kamtschatka, be- 

 tween Ocnotsk and Kantsch. It appears to have been introduced into England iu 1818, but we have 

 not seen it in cultivation. 



-t 4. A. AMERiCA^NA S'lms. Thc American Atragene. 



Identification. Sims, in Bot. Mag., t. 887. ; Swt. Hort. Brit. ; Don's Mill., 1. p. 10. 

 Synimyme. Clematis verticilliris Dec. Prod., 1. p. 10. 

 Engravings. Bot. Mag., 887. ; E. of PI., 7965., and ontfig. 27. 



Spec. Char. Peduncles 1-flowered ; leaves whorled, in fours, tcrnate ; leaflets 

 stalked, cordate, lanceolate, acuminated, entire or somewhat lobed or ser- 

 rated. Petals acute. {Don's Mill., i. p. 10.) North America. Flowers pur- 

 pli.sh blue. May to July. 1797. Height 13 ft. 



Varieti/. 



1 A. fl. 2 obliqua Douglas MS. The oblique American 

 Atragene. — Leaflets bluntly serrated. (Don.)\ 

 Description. This species is distinguishable from all 



the other Clematideai described in this work, by the 



peculiarity of its leaves being di.sposctl, not oppositely, 



in alternately decussating pairs, but in whorls of four. 



This is an anomalous characteristic, which De Candolle 



has expressed by his specific epithet verticillaris. The 



flowers are large, of a palish purple, and less showy than 



those of A. alpina. 



Grographi/, Histori/, Sfc. Found in North America, in shady places, on the 



sides of rivulets, climbing and creeping among loose rocks ; at New York and in 



Pennsylvania ; near the foot of thc Blue Mountains ; on the eastern declivity of 



the Rocky Mountains ; and at Cape Mendocina, on the north-west coast. 



Dougla.s's varictv is found on the eastern declivity of the Rocky Mountains, 



in valleys; and at Cape Mendocina, on the western coast. The species appears 



