274 
BULBINELLA 
Bulbinella Kunth. Liliaceae (hi). 13 sp. S. Afr., N. Z., & c. 
Bulbocodium Linn. Liliaceae (1). 1 sp. Eur. 
Bulbophyllum Thou. Orchidaceae (22). 100 sp. trop. and S. temp. 
Epiphytes with great reduction of leaf surface. The leaves are often 
mere scales and the assimilation is performed by the tubers. In B . 
minutissimum F. Muell., and other sp., the tubers are hollow with 
the stomata on the inner surface (cf. the leaf of Empetrum). For 
the flr. see Darwin’s Orchids , p. 137. 
Bulliarda DC. = Tillaea Michx. 
Bumelia Sw. Sapotaceae (1). 20 sp. Am. 
Bunchosia Rich. Malpighiaceae. 30 sp. trop. Am. Like Malpighia. 
Bunias (Tourn.) Linn. Cruciferae (iv. 19). 5 sp. Medit., As. In 
some sp. the frt. is provided with hooks. 
Bunium Linn. = Carum L., and Conopodium Koch (in part). 
Buphthalmum Linn. Compositae (iv). 4 sp. Eur., As. minor. 
Bupleurum (Tourn.) Linn. Umbelliferae (5). 90 sp. Eur., As., Afr., 
N. Am. 4 Brit. sp. (buplever or hare’s ear), of which B. rotundifolium 
L. is most common ; it has perfoliate leaves, whence the name throw- 
wax (thorow-wax) by which it is sometimes known. All sp. have 
entire leaves, an unusual thing in this order. 
Burbidgea Hook. f. Zingiberaceae. 1 sp. Borneo (p. 148). The corolla 
segments are large, the lateral staminodes absent. The small labellum 
and petaloid sta. stand up in the centre of the flr. 
Burchellia R. Br. Rubiaceae (8). 1 sp. Cape Col. 
Burlingtonia Lindl. = Rodriguezia Ruiz et Pav. 
Burmanniaceae. Monocotyledons (Microspermae). A small order of 
tropical forest plants, chiefly “ colourless ” saprophytes. Chief genera : 
Burmannia, Thismia. (See Nat. Ff. t and Ann. of Bot. 1895.) 
Bursa Wigg = Capsella Medic. 
Bursera ‘ Jacq.’ ex Linn. Burseraceae. 45 sp. trop. Am. B. gummi- 
fera L. furnishes the resin known as American Elemi. 
Burseraceae. Dicotyledons (Archichl. Geraniales). 13 gen. with 300 
sp. trop. Shrubs and trees with alt., usually compound, dotted 
leaves. Balsams and resins occur, in lysigenous or schizogenous 
passages. Firs, small, generally unisexual, with disc like Rutaceae, 
5- or 4-merous, obdiplostemonous when both whorls of sta. are 
present. Cpls (5 — 3). Ovules usually 2 in each. Ovary multiloc. 
with one style. Drupe or capsule. Seed exalbuminous. Many of 
the order are useful on account of their resins &c. 
Chief genera : Commiphora, Boswellia, Bursera, Canarium. 
[Placed by Benth.-Hook. in Geraniales, by Warming in Terebinthinae.] 
Butea Koen. Leguminosae (ill. 10). 4 sp. Ind., China. B.fro 7 tdosa 
Roxb. is the Dhak or Pulas tree of Bengal, one of the handsomest of 
trees when in flower. A red juice flows from incisions in the bark; 
it is known as Bengal Kino and used as an astringent. The flrs. yield 
an orange-red dye. The tree also yields lac (see Ficus). 
