The Flora of Wiltshire. 201 
ORDER. DIOSCOREACEA. (R. BROWN.) 
Tamus, (Liny.) Biack Bryony. 
Linn. Cl, xxii. Ord. vi 
Name. Given by Columella to a plant resembling a vine, and 
supposed to be the Uva Taminia of Pliny. 
1. T. communis, (Linn.) common Black Bryony. Hngé. Bot. t.91. 
_ Locality. Hedges and bushy places. P. Fl. May, June. Area, 
1. 2.3.4.5. Recorded in all the Districts. An elegant climber, 
twining to a considerable length over hedges and bushes. Flowers 
yellowish-green, small, the males in slender racemes, often branched 
and longer than the leaves; the females in much shorter and closer 
racemes. Berries red, often very numerous. 
ORDER. HYDROCHARIDACA. (JUSS.) 
Awacuaris, (Ricu.) Water Tuyme. 
; Cl. xxii. Ord. i. 
Named from ana, without, and charis, elegance; apparently in 
contrast to the next genus. 
1. A. Alsinastrum, (Bab.) long flowered Anacharis. Bab. im Ann. 
Nat. Hist. ser. 2,1, p. 83, ¢. 8. Engl. Bot. Suppl. t.2993. Hlodea 
canadensis (Benth). 
Locality. In the Upper and Lower Avon, Kennet and Avon 
Canal, ponds and ditches. P. Fl. July, September. Area, 1. 2. 3. 
4,5. In ali the Districts introduced, now too generally diffused. A 
dark green, much branched perennial, entirely floating under water. 
Leaves numerous in verticils of 3 (more rarely 4) or the lower ones 
opposite, oval, or linear oblong, very finely and obscurely serrulate. 
Female flowers, the only ones known in this country, sessile in the 
upper axils, in a small two-lobed spatha; but with a very long, 
slender tube, often two or three inches long, so as to attain the sur- 
_ face of the water, where it terminates in three spreading segments. 
Male flowers unknown in England. — 
ORDER. ORCHIDACE. (JUSS.) 
Orcuis, (Linn.) Orcuis. 
Linn. Cl. xx. Ord. i. 
' Name. Orchis, an ancient appellation of plants, with a double 
tuberous root. 
