6io 
TRIFOLIUM 
where the fruits ripen (cf. Arachis). T. badinm Schreb. has a wing 
upon the fruit formed by the persistent corolla, T. fragiferum L. a 
bladdery ‘wing’ formed by the calyx. The clovers are important 
pasture and hay plants ; among the chief sp. are T. repens L. (white 
or Dutch clover). T. pratense L. (red clover), T, hybridum L. 
(alsike), &c. 
Triglocliin Riv. ex Linn. Juncaginaceae. 12 sp. cosmop.; 2 in Brit, 
(arrow-grass), in fresh water- or salt-marshes (T. palustre L. and 
T. maritimum L.). Tufted herbs with leafless flowering stems (scapes) 
ending in spikes or racemes. Leaves linear, fleshy in the maritime 
sp. (p. 187). P 3 + 3, A 3 + 3, G (3 + 3), or sometimes 3 with 3 
abortive cpls. between the fertile. By a process of secondary growth 
the inner whorl, of perianth comes to stand higher on the axis than 
the outer sta. Fir. protogynous, wind-pollinated. The pollen collects 
in the hollowed bases of the perianth-leaves. The ripened cpls. sur- 
round a central beak (cf. Geranium), and are prolonged outwards at 
the base into long sharp spines, by whose means, breaking away from 
the beak, they are animal-distributed. 
Trigonella Linn. Leguminosae (ill. 4). 70 sp. Medit., Eur. (1 Brit.), 
As., S. Afr., Austr. T. Foenam-graccum L. (fenugreek) is sometimes 
cultivated ; its seeds are used in veterinary medicine. The firs, of T . 
Aschersoniana Urban bury themselves like those of Arachis. • 
Trigonia Aubl. Trigoniaceae. 26 sp. trop. Am. 
Trigoniaceae. Dicotyledons (Archichl. Geraniales). 2 gen. with 28 sp., 
placed in Vochysiaceae by Benth.-FIooker. See Nat. Pfl. 
Trillium Linn. Liliaceae (vn). 15 sp. E. As., N. Am. Like Paris. 
Trinia Hoffm. Umbelliferae (5). 7 sp. Eur., As., Medit. (1 Brit.). 
Triodia R. Br. Gramineae (x). 20 sp. temp. (T. decu?nbens Beauv. in 
Brit.). 
Triopteris Linn. Malpighiaceae. 3 sp. Caribbean Sea. 
Triosteum Linn. Caprifoliaceae (11). 5 sp. Himal., E. As., N. Am. 
Triphasia Lour. Rutaceae (x). 1 sp. China. 
Triplaris Loefl. Polygonaceae (111. 6). 10 sp. trop. S. Am. All are 
said to harbour ants in their hollow stems (cf. Cecropia). Fir. cyclic 
(see order), dioecious. The 3 outer perianth-leaves grow into long 
wings which project beyond the fruit and aid in distribution. 
Tripsacum Linn. Gramineae (1). 3 sp. trop. and subtrop. N. Am. 
T. dactyloides L. is a fodder grass. It is like Euchlaena, but with 
cT and ? firs, in the same infl. 
Tripteris Less. Compositae (ix). 32 sp. S. Afr. to Arabia. The fruit 
has three wings. 
Trisetum Pers. Gramineae (ix). 50 sp. temp. 7 ’. Jlavescens Beauv. 
in Brit., a good forage grass. 
Triteieia Dougl. = Brodiaea Sm. 
Triticum Linn. Gramineae (xii). 15 sp. Medit., W. As. The spike- 
lets are 2 — 5 -flowered and arranged in a dense spike. T. vulgare 
