70. ARISTOLOCHIACES. 279 
nerves usually obscure. Middle bract in the lower part of racemes 
longer than the flowers. Tube of perianth very short, open, fun- 
nelshaped ; segments triangular, spreading, with a tooth on each 
side. Fr. oval, longer than the persistent perianth which is 
usually only inflexed at the end, strongly ribbed and slightly re- 
ticulated.—Chalky and limestone (oolite) hills. P. VI. VII. E. 
[T. intermedium (Schyad.); st. more erect panicled, panicle 
pyramidal, the lowest branches longest, 1. linear-lanceolate 3- 
nerved; is said to be a native of Britain, but all the specimens 
which I have seen belong to T. humifusum.] 
2. T. humile (Vahl); racemes spiked, fl. nearly sessile, fr. 
strongly ribbed and reticulated sessile crowned with the very 
short inflexed perianth, 1. fleshy linear 1-nerved.—R. I. ix. 542. 
—Fr. 4 or 5 times as long as the persistent inflexed perianth. 
Middle bract much longer than the flowers.—I gathered 2 spe- 
cimens of this plant somewhere near Dawlish in Devonshire, in 
1829. P. VIL. VIII. 
Order LXX. ARISTOLOCHIACEA. 
Perianth adnate to the ovary below, tubular above, with a 
lobed dilated usually irregular mb. Stam. 6—12, epigynous. 
Ovary 3—6-celled. Style simple; stigma radiant. Fr. many- 
seeded. Seed with a minute embryo at the base of fleshy albu- 
men,—For fig. of genera see G. F. G. Monochil. 50, 51. 
1. ArIstoLocHia. Perianth tubular, swelling at the base ; 
mouth dilated on one side. Anth. 6, adnate to the short 
columnar style under the 6-lobed stigma. Caps. 6-celled. 
2. Asarum. Perianth bellshaped, 3-fid. Stam. 12, inserted 
at the base of the style. Anth. attached to the middle of 
the filaments. Stigma 6-lobed. Caps. 5-celled. 
1. Aristotocuia Linn. Birthwort. 
*1. A. Clematitis (L.); root creeping, st. erect simple, 1. cor- 
date stalked glabrous, fl. aggregate —H. B. 398. St. 6. 16.—Fi. 
pale yellow.—Naturalized near old ruins. P. VII. VIII. E. 
2. Asarum Linn. Asarabacca. 
1, A. ewropeum (L.); 1. reniform obtuse.—E. B, 1083. St. 2. 7. 
—St. short, with 2 leaves, between which there is a solitary 
drooping dull green fl.; segments of the perianth ovate and in- 
curved. Filaments extending beyond the anthers. Woods in the 
north, rare. P. V. E. 
