ARBORETUM AND FHUT1CETUM. 



PART III. 



26 



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

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

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

 or July. 1753 Height 12 ft. 



Variety. A blue-flowered variety of this species is men- 

 tioned, in Bot. Mag., t. 1591. 



Description. 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- 

 looking, 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. 

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

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

 and perhaps less numerous. 



Geography, History, Sf-c. Found in the mountainous 

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

 vering the shrubs and underwood, 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 eye with its 

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

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



1 3. A. OCHOTE'NSIS Pall. The Ochotskoi Atragene. 



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



Synonymes. Atragene tuolacea Pall. ; Clematis ochotensis Poir. ; and Dec. Prod., 1. p. 10. 

 Spec. Char. Peduncles 1-flowered. Leaves biternate ; leaflets oblong-lanceolate, acuminated, ser- 

 rated. Petals few, linear. (Don's Mill.) Siberia. Flowers violet. From May to July. 1818 Height 

 12ft. 



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

 riety. 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, $c. Native of Siberia, towards the Ochotskoi Sea ; and of Kamtschatka, be- 

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

 not seen it in cultivation. 



-^ 4. A. AMERICA V NA Sims. The American Atragene. 



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

 Synonyme. Clematis verticillaris Dec. Prod., 1. p. 10. 

 Engravings. Bot. Mag., 887. ; E. of PL, 7965., and our fig. 27. 



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

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

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

 plish blue. May to July. 1797. Height 15 ft. 



Variety. 



_t A. a. 2 obllqua Douglas MS. The oblique American 



Atragene. Leaflets bluntly serrated, (Don.) i 

 Description. This species is distinguishable from all 



the other Clematideae described in this work, by the 



peculiarity of its leaves being disposed, 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. 



Geography, History, $c. 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 the Blue Mountains ; on the eastern declivity of 



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



Douglas's variety is found on the eastern declivity of the Rocky Mountains, 



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



