296 
Large-calyxed Polymeria. PI. creeping. ? 
2 P. rusínLA (R. Br. l. c.) sepals equal; leaves cordate, 
somewhat emarginate; peduncles 1-flowered; seeds rather vil- 
lous. %. S. Native of New Holland, within the tropic. 
Var. a; leaves ovate, obtuse. 
Var. B; leaves sub-hastate, linear. 
Small Polymeria. Pl. creeping. 
3 P. evapriva'Lvis (R. Br. l. c.) sepals equal; leaves cor- 
date, obtuse, glabrous above, but downy on the veins beneath ; 
peduncles 1-flowered ; capsule 4-valved, 2-seeded ; seeds 
tomentose. 2/.S. Native of New Holland, within the tropic. 
Four-valved-fruited Polymeria. Pl. creeping. 
4 P. rana'ta (R. Br. l. c.) sepals equal; leaves cordate, ob- 
tuse, mucronulate, woolly on both surfaces, as well as the seeds ; 
peduncles 1-flowered. 4. S. Native of New Holland, within 
the tropic. 
Woolly Polymeria. PI. creeping ?. 
5 P. ampicua (R. Br. l. c.) sepals equal; leaves cordate- 
oblong, obtuse, mucronulate, smoothish above, and woolly be- 
neath ; peduncles 1-3-flowered. 2%. S. Native of New Hol- 
land, within the tropic. 
Ambiguous Polymeria. Pl. creeping. 
Cult. The species of Polyméria will grow in a mixture of 
sand and loam; and they are easily increased by separating the 
creeping, rooted shoots, or by cuttings. 
XIX. CALYSTEGIA (from kaAv£, calyx ; and oreyw, stego, 
to cover; in reference to 2 large opposite bracteas which inclose 
the flower.) R. Br. prod. p. 483. Choisy, in mem. soc. phys. 
gen. 6. p. 485.—Convélvulus species of Lin. and other authors. 
Lin. syst.  Pentándria, Monogynia. Calyx 5-parted, inclosed 
within 2 foliaceous bracteas. Corolla campanulate, 5-plicate. 
Style one; stigma 2-lobed: lobes terete or globose. Ovarium 
2-celled ; cells 2-ovulate. Capsule 1-celled from the shortness 
of the dissepiment.—Lactescent, glabrous, twining, or prostrate 
herbs. Peduncles solitary, 1-flowered. 
1 C. sz‘prum (R. Br. prod. p. 483.) leaves sagittate or cor- 
date, very acute: hind lobes obtuse or truncate, entire; brac- 
teas cordate, keeled, acute, longer than the calyx, but one half 
shorter than the corolla; peduncles tetragonal, exceeding the 
petioles; sepals acute. 2t. C. H. Native throughout Europe, 
in hedges; also of Caucasus, and on the banks of the river St. 
Laurence ; New South Wales, south coast of New Holland, and 
Van Diemen’s Land. Very common in Britain. Conv. sépium, 
Lin. spec. 1. p. 218. Willd. spec. 1. p. 844. Œd. fl. dan. t. 458. 
Smith, engl. bot. t. 313. Curt. fl. lond. 1. t. 13. Stev. and 
Church. med. bot. 1. p. 11. t. 2.—Plenck. off. t. 91. Mayer- 
hoffer, fl. mon. t. 27. Conv. Tuguriórum, Forst. prod. no. 74, 
is hardly distinct. Flowers white, sometimes tinged with red. 
Roots creeping much, and difficult to extirpate; and, like the 
roots of most perennial convolvulaceous plants, are purgative in 
a greater or less degree. A pill composed of one ounce and a 
half of the extract of this root, two drachms of aloes, and one 
drachm of ginger, acts with certainty and ease in doses of 10 
grains, and might be substituted in most cases for the compound 
extract of colocynth, where economy is required. Haller 
affirms, that the expressed juice, if taken in the quantity of 20 or 
30 grains, possesses the virtues of scammony: hence it is some- 
times called German scammony, and is recommended by Dr. 
Mason Good, as a hydrogogue purgative in dropsies. 
Var. B, incarnàta ; corollas pale red; white, with a red 
border, or beautiful crimson, as figured in bot. mag. no. 732. 
y.%. H. Native of North America, from Canada to Carolina, 
in hedges, and among bushes, sometimes trailing on the ground. 
CONVOLVULACEH. XVIII. Potymenrtia. 
XIX. Catysreaia. f 
Cony. répens, Michx. fl. bor. amer. 1. p. 137. 
Ist. p. 158. ed. 2d. p. 225.—Gron. virg. p. 28. 
Var. y, maritima (Gouan. monsp. p. 27.) leaves narrow: 
more fleshy, nearly lanceolate. 
Hedge Calystegia, or Common Bind-weed. 
Britain. Pl. tw. 
2 C. suBvoLU'BrLIS; stems erect at bottom, smoothish, þet 
twining at top, and rather villous ; lower leaves mucronate, co:- 
dately sagittate : with the hind lobes roundish; superior leaves 
acuminated, hastate; peduncles erect, longer than the leaves; 
braeteas broad-cordate, acute, rather hairy, one half longer tban 
the calyx; sepals ovate, acute. 2t. C. H. Native of Dahura, 
in stony, mountainous places. Conv. subvolübilis, Bunge, in 
Led. fl. ross. alt. ill. t. 205. fl. alt. 1. p. 222. Root creeping. 
Corolla pale red, larger than that of C. sépium. 
Somewhat-twining Calystegia. Pl. twining. 
3 C. rzrLimA; twining, villous; leaves ovate-oblong, mu- 
cronate, somewhat cordate at the base; peduncles about equal in 
length to the leaves; bracteas cordate, acute, villous, one half 
longer than the calyx; sepals elliptic, acuminated, ciliated, vil- 
lous. %.^©.H. Native of Siberia, near Irkutsk. Conv. pel- 
litus, Led. fl. ross. alt. ill. t. 206. fl. alt. 1. p. 223. Hind lobes 
of leaves drawn out, rounded, and mucronate. 
Clothed Calystegia. PI. twining. 
4 C. sytve’stris (Roem. et Schultes, syst. 4. p. 183.) leaves 
cordate-sagittate: hind lobes angularly truncate, approximate ; 
peduncles nearly terete; bracteas ovate, obtuse or emarginate, 
concave, swollen, keeled, longer than the calyx; sepals obtuse. 
3.^. H. Native of Hungary, about Mehadia, near the hoi 
baths of Hercules. Conv. sylvaticus, Willd. enum. 1. p. 202. 
Waldst. et Kit. pl. rar. hung. 3. p. 290. t. 261. Schultes, cest. 
fl. 2. ed. 1. p. 381. Very nearly allied to C. sépium. Co- 
rollas large, white. 
Wild Calystegia. Fl. June, Sept. Clt. 1815. PI. tw. 
5 C. Lucana; leaves sagittate : hind lobes entire; peduih- 
cles tetragonal, longer than the leaves; bracteas ovate-oblong, 
acuminated, clasping the calyx; corolla with a long cylindrical 
tube. XY. u. H. Native of Lucania, in woods. Convólvulus 
Lucànus, Tenore, fl. neap. prod. append. 5. 1826. Tube of 
corolla 2-3 inches long; limb white, red below. This species 
differs from C. sépium in the tube of the corolla being cylin- 
drical, and twice as long, in the bracteas being concave, and 
clasping the calyx, not flat. 
Lucania Calystegia. Pl. tw. 
6 C. Danv'rica (Sims, bot. mag. 2609, under Convólvulus.) 
stems tomentose; leaves glabrous, oblong-cordate, having the 
margins and nerves on the under side tomentose; peduncles 
tetragonal, tomentose; bracteas broad-ovate, acute, longer than 
the calyx; sepals lanceolate, acute, the 2 outer ones broadest. 
2.^.H. Native of Dahuria. Corolla ofa rosy purple colour. 
Roots creeping. 
Dahurian Calystegia. Fl. July, Aug. Clt. 1826. Pl.tw. 
7 C. Carzspya‘na (Pursh, fl. amer. sept. 2. p. 729.) tomen- 
tose; leaves oblong-sagittate, acuminated ; peduncles 1-flowered, 
shorter than the leaves; bracteas oval, obtuse, longer than the 
calyx. Y.C. H. Native of Carolina. Conv. Catesbee'i, Spreng. 
syst. 1. p. 603. Flowers large, purple. 
Catesby’s Calystegia. PI. tw. 
8 C. rAnADÓxA (Pursh, fl. amer. sept. 2. p. 729.) trailing, 
tomentose ; leaves oblong, cordately sagittate, acute; peduncles 
elongated, 1-flowered, longer than the leaves ; bracteas linear, 
remote from the flower ; calyxes naked, glabrous, acuminatéd. 
4. H. Native of Virginia or Carolina. Conv. paradóxus, 
Spreng. syst. 1. p. 608. Flowers large, white. 
Paradoxical Calystegia, Pl. trailing. 
Lin. spec. se 
Fl. Ju. Sept. 
