90 BOTRYCHIUM 



well as the fertile part of the 1. is usu. branched. The r. appear one 



at the base of each 1., and branch monopodially. The spike is usu. 



much branched, the ultimate twigs being the sporangia. 



B. Lunaria has no veg. repr. like Ophioglossum, and each new 



pi. comes from a prothallus, which is small, not > i or 2 mm. long, 



oval, saprophytic, buried to a depth of i-io cm. In B. virginianum 



Sw. it is as mvfch as 20 mm. long, and seems to remain attached to 



the sporophyte for 5 or 6 years. The prothallus has a mycorhiza. 



(Jeffrey, Univ. of Toronto Studies, 1898; Bruchmann in Flora, 96, 



1906, p. 203.) 



Botrymorus Miq. (Pipturns Wedd. EP.). Urtic. (3). i Malaya. 

 Botryophora Hook. f. Euphorbiaceae (B. li). i Perak. 

 Botryopleuron Hemsl. Scrophulariaceae (in. i). 5 China. 

 Botryose, racemose. 



Bottionea Colla. Liliaceae (in), i Chili. 

 Bottle-brush, Callistemon; -cod-root (W.I.), Capparis; -gourd, Lage- 



naria; -grass (Am.), Setaria viridis Beauv. 

 Boucerosia Wight et Arn. (Caralluma p.p. EP.). Asclepiad. (n. 3). 



30 trop. Afr. and As. 



Bouchardatia Baill. (Mdicope BH.}. Rutac. (i). i E. Austr. 

 Bouchea Cham. Verbenaceae (2). 20 trop. 

 Bouchetia DC. Solanaceae (4). 3 Texas to Brazil, 

 Bouea Meissn. Anacardiaceae (i). 4 Malaya. 

 Bouetia A. Chevalier. Labiatae (vn). i Dahomey. 

 Bougainvillaea Comm. ex Juss. Nyctaginaceae. 12 S. Am. The 



group of 3 fls. is surrounded by 3 lilac or red persistent bracts. 



B. spectabilis Willd. is a splendid flowering creeper often cult. 

 Bougueria Decne. Plantaginaceae. i Andes. 

 Bourgeon, to bud or sprout. 



Bourgia Scop. Boraginaceae (inc. sed.). Nomen. 

 Bournea Oliv. Gesneriaceae (i). i China. 

 Bourreria P. Br. (Beureria Jacq.). Boragin. (n). 30 trop. Am., 



W. Ind. 



Bousigonia Pierre. Apocynaceae (i. i). 3 Cochinchina. 

 Boussingaultia H. B. et K. Basellaceae. 10 trop. Am. Tubers ed. 

 Bouteloua Lag. Gramineae (n). 40 Canada to S. Am., mainly in 



SW. U.S. (mesquit grasses, grama, side-oats). They form a large 



proportion of the herbage of the prairie, and are valuable as fodder. 

 Boutonia DC. (Periblema DC. BH.}. Acanth. (iv. A), i Madag. 

 Bouvardia Salisb. Rubiaceae (i. 5). 30 trop. Am. Some heterostyled 



like Primula. Cult. orn. perf. fls. 



Bouzetia Montr. Rutaceae (inc. sed.). i New Caled. 

 Bowdichia H. B. et K. Legumin. (in. i). 2 trop. S. Am. Good 



wood. 

 Bowenia Hook. Cycad. i Queensland, B. spectabilis Hook., easily 



recognized by the bipinnate 1. The upper part of the main r. gives 



rise to curiously branched apogeotropic r., which contain Anabaena 



(an alga) living in symbiosis, and branch exogenously (Ann. Bot., 



1898). 

 Bowlea Ilarv. Liliaceae (in), i S. Afr., B. vo/nbilis Harv., a xero. 



like Testudinaria, with a large partly underground stock (corm), 



