The Flora of Wiltshire. 



201 



ORDER. DIOSCOREACE^E. (R. BROWN.) 

 Tamus, (Linn.) Black Bryony. 

 Linn. CI. 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. Engl. Bot. t. 91. 

 Locality. Hedg-es and bushy places. P. Fl. May, June. Area, 

 L 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. HYDROCHARIDACiE. (JUSS.) 

 Anachaeis, (Rich.) Water Thyme. 

 CI. xxii. Ord. i. 



Named from ana, without, and char is, elegance ; apparently in 

 contrast to the next genus. 



1. A. Alsinastrum, (Bab.) long flowered Anacharis. Bab. in Ann, 

 Nat. Hist. ser. 2, 83, t. 8. Engl. Bot. Suppl. t. 2993. Elodea 

 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 all 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. ORCHIDACEiE. (JUSS.) 

 Orchis, (Linn.) Orchis. 

 Linn. CI. xx. Ord. i. 

 Name. Orchis, an ancient appellation of plants, with a double 

 tuberous root. 



