CHAP, xcviii. 



/^RISTOI.OCHIA Ci:^. y^RISTOLO CHlA. 



13^9 



^ 1. A. si'PHO UHcrit. The Siphon-/M<', or tube-flowered, Birthwort. 



Identification. Ait. Hort. Kcw., :3. p. 311. ; L'H^rit. Stirp. Nov., 13. t. 7. : Miolix Fl. Bor. Amcr., 2. 



p. 161. ; Willd. Sp. PI., i. p. 155. ; Lodd. Cat., ed. 1S36. 

 Sy nonymes. A. niacrophjila Lam. Encycl., 1. p. 252. ; Aristoloche Syphon, Fr. \ grossblattrige 



O sterluzey, Ger. ; Pipe Vine, or Birthwort, A?ner. 

 Engravings.' L'Herit. Stirp. Nov., t. 7.; N. Du Ham., 4. t. 10.: Bot. Mag., t. 534 : and our 

 fig. 121 II. 



Spec. Char., Sfc. Stem twining. Leaves cordate, acute. Bractea of the 

 peduncle ovate. Corolla ascending; its limb in 3 equal portions, not ex- 

 panding flat, brown. {Willd.) A deciduous twining shrub; a native of 

 North America, on the Alleghany 

 Mountains, from Pennsylvania to 

 Carolina; producing its yellowish 

 brown flowers in May and June. It 

 was introduced in 1763, and is fre- 

 quent in gai'dens, where it forms a 

 tall twining shrub, flowering abun- 

 dantly. In favourable situations it 

 reaches to a considerable height : a 

 plant in the Cambridge Botanic Gar- 

 den, after reaching the top of the 

 wall it was planted against, ascended 

 a tree in the next garden; in all 20ft. 

 The appearance of the magnificent 

 leaves of this species is striking. In 

 its native country, it climbs and 

 twines to the summits of the very 

 highest trees; flowering early in sum- 

 mer, and ripening its seeds in autunm, 

 tliough but sparingly. This species 



is remarkable for the form of its ' ""^S^ 1210 



flower, which is bent like a siphon; for the trifid border of its corolla; for 

 the very large bractea placed on the middle of the peduncle ; and fo.- the 

 disposition of the seeds, and the aril common to all the seeds of each cell. 

 The roots are woody, and have the smell of camphor. The stems, branches, 

 and twigs are also strongly scented, as are the flowers. In Britisii gardens, 

 this species, to grow freely, requires a deep free soil, dry rather than moist, 

 and a warm situation. It is propagated by division of the root, by sucker.s, 

 or by seeds, which are sometimes received from North America. Price 

 of plants, in the London nurseries, Is. M. each ; at Bollwyller, 2 francs ; 

 and at New York, 50 cents. 



-i 2. A. TOMENTo'sA Sims. The tomentose Birthwort. 



Identification. Sims in Bot. Mag., t. 1369. ; Lodd. Cat., ed. 1836. 

 Engravings. Bot. Mag., t. 1369. ; Bot. Cab., t. 641. ; and our.Ag.lSll. 



Spec. Char., Sfc. Stem twining. Leaves cordate, downy 

 beneath. Peduncle solitary, without a bractea. Corolla 

 with its tube twisted back, and much more deeply' divided 

 than in A. sipho, expanding flat, and yellow, with the 

 mouth of the tube of a deep purple. (Enct/c. of PI.) 

 A native of North America; introduced in 1799, 

 There is a plant in the Chelsea Botanic Garden, 

 which is 12 ft. high ; but we are not without consider- 

 able doubts as to its being any thing more than a 

 variety of A. sipho. Being tolerably' distinct, however, 

 it merits a place in collections. 



App. i. Half-hardy Species of Kristolochia. 



A. sfmpervircns L , Bot. Mag., t. 1116., Bot. Cab., t. 231., is a native of Candia; introduced in 

 1727, and prottuces its tUnver.s in May and June. In green-houses, it is seldom seen more tlian 4 ft 

 or 5 ft. in height ; but, against a conservative wall, it would probably grow much higher 



4 S 2 



