586 
TETRAGONOLOBUS 
Tetragonolobus Scop. = Lotus Tourn. 
Tetramicra Lindl. (Leptotes Lindl.). Orchidaceae (13). 1 sp. Brazil. 
Tetranthera Jacq. =Litsea Lam. 
Tetrapanax C. Koch = Fatsia Dene. 
Tetrapleura Benth. Leguminosae (1. 4). 3 sp. trop. W. Afr. 
Tetrapteris Cav. Malpighiaceae. 60 sp. trop. Am., W. Ind. Lianes. 
Teucrium (Toum.) Linn. Labiatae (1. 1). ioo sp. cosmop. ; 4 in 
Brit, (wood sage or germander), incl. T . scorodonia L. Fir. with 
small upper lip, protandrous with movement of style and sta. 
Thalia Linn. Marantaceae. 7 sp. trop. and sub-trop. Am. The 
staminode (3 (see order) is present. 
Thalictrum Tourn. ex Linn. Ranunculaceae (3). 76 sp. N. Temp. 
(T. flavum L., the meadow-rue, and 2 others in Brit.). The firs, are 
small; the perianth sepaloid or only slightly coloured and soon 
dropping off. Some sp. are visited by pollen-seeking insects, but 
T. minus L. and others have become wind-fertilised and protogynous, 
retaining however traces of their entomophilous ancestry in a slight 
cohesiveness of the pollen and the fact that as in the rest of the order 
the anthers dehisce successively (p. 85). 
Thapsia Linn. Umbelliferae (9). 4 sp. Medit. 
Thea Linn. (excl. Camellia Linn.). Theaceae. 8 sp. India to Japan. 
Often united to Camellia ; T. has stalked nodding firs., C. sessile up- 
right ones. The chief sp. is T. sinensis L., the tea plant, largely culti- 
vated in China, India, Ceylon, &c. When growing wild it forms a tree, 
but in cultivation it is kept pruned into a small bush. The young 
shoots are nipped off, withered, rolled, fermented (except for green 
tea), dried, and sorted into grades (pekoe, souchong, congou, &c.). 
Cf. Bald, huiian Tea ; Watt, Diet. [Synonymy : T. Bohea L. and T. 
viridis L.= T, sinensis; T. Camellia Hoffmgg.= Camellia japonic a. 
Theaceae. Dicotyledons (Archichl. Parietales). 16 gen. with 175 sp. 
• trop. and subtrop. Trees or shrubs with simple alt. leathery leaves. 
Firs, usually solitary, £ , often partly spiral. K 5, 6 or 7, imbricate, 
persistent; C 5, rarely 4, 9 or 00, imbricate; A 00, rarely 5, 10 or 15, 
free or in bundles or united into a tube ; ovary superior, 2- 3- 5- io-loc., 
with 2, 4 or 00 anatropous ovules in each loc. Capsule or drupe. 
Embryo usually curved ; endosperm little or none. The only im- 
portant economic plant is Thea ; Camellia is a favourite in green- 
houses. Chief genera : Thea, Camellia, Gordonia, Ternstroemia, 
Eurya. Benth. -Hooker unite to T. several other genera to form the 
order Ternstroemiaceae (q.v.). Warming places T. in Cistiflorae. 
Thelygonaceae. See Cynocrambaceae. 
Thelygonum Linn. (Cynocrambe Tourn.). Cynocrambaceae (only genus). 
2 sp. Medit., Orient., incl. T. Cynocrambe L. ( C . prostrata Gaertn.). 
The lower part has opp. leaves, the upper is sympodial with alt. 
leaves. Opposite each leaf in this part is a group of $ firs, without 
bracts, while in the axil of the leaf is a branch ending in ? firs. The 
