BRICKELLIA 
2 73 
Brainea Hk. Polypodiaceae. i sp. Hong-kong and Khasia, B. insig - 
nis Hk., a dwarf tree-fern. The primary veins branch and rejoin 
repeatedly, forming small areas in the leaf ; the veinlets run parallel 
and distinct. 
Brasenia Schreb. Nymphaeaceae (n). i sp. cosmop., except Eur. 
Sta. 12 or more. 
Brassaiopsis Dene, et Planch. Araliaceae. io sp. Indo-mal. 
Brassavola R. Br. Orchidaceae (13). 20 sp. trop. Am. 
Brassia R. Br. Orchidaceae (28). 30 sp. trop. Am. 
Brassica (Tourn.) Linn, (inch Erucastrum Presl. and Sinapis L.). 
Cruciferae (11. 10). 85 sp. Eur., Medit., As. 7 in Brit. Many forms 
of this genus are cultivated, some for the fir., others for the stem, 
root, leaf, or seed. B. (.S’.) nigra Koch is the black mustard, whose 
ground seeds form the familiar condiment ; B . (S.) alba Boiss. 
is the white mustard, used when young in salads, &c. ; B, sinapis 
Vis. (6*. arvensis L.) is the charlock, one of the most abundant 
weeds of cultivation (in summer our corn-fields are yellow with it). 
B. oleracea L. is the cabbage, with the various races derived from 
it, such as cauliflower and brocoli (fleshy infh), kale or curly greens 
or borecole, brussels-sprouts (a form in which miniature cabbages are 
produced in all the leaf-axils on the main stem), kohl-rabi or knol- 
kohl (trop.) (a thickened stem, or corm, showing leaf scars on its 
surface), &c. B. campestris L. is the turnip, a biennial with 
thickened root, and a variety of it — B, Napus L. — is the rape, 
used in salads and in the preparation of rape- or colza-oil, expressed 
from the seeds. [See De Candolle’s Orig. of Cultiv . Pits.] It is of 
interest to notice here the great variety of morphology in the vegetative 
organs, correlated with the different ways in which storage of reserve 
materials is effected, in the root, stem, leaf, flowerstalk, &c. 
Sauer-kraut, or salted cabbage, made by packing cabbage shreds 
in barrels with salt and pepper, and slightly fermenting, is a favourite 
food in Germany, especially for winter use. 
The outer coat of the seed has mucilaginous cell-walls which swell 
when wetted and help to fasten the seed to its place of germination 
(cf. Linum). 
Bravoa Lex. Amaryllidaceae (11). 3 sp. Mexico. Rhizome with 
tuberous roots. Fir. zygomorphic by bending. 
Braya Sternb. et Hoppe. Cruciferae (iv. 18). 8 sp. Mts. of Eur., As. 
Brayera Kunth. ( Hagenia Willd.) Rosaceae (in. 9). 1 sp. Abyssinia. 
The dried ? firs. (Koso) are used as a remedy for tapeworm. 
Bredemeyera Willd. Polygalaceae. 50 sp. S. Am., Austr. 
Brevoortia Wood. Liliaceae (iv). 1 sp. Calif. 
Breweria R. Br. Convolvulaceae (1. 2). 50 sp. trop. 
Brexia Noronha. Saxifragaceae (v). 1 sp. Madag., Seychelles. 
Breynia Forst. Euphorbiaceae (a, 1. 1). 15 sp. trop. As., Austr. 
Brickellia Ell. Compositae (11). 60 sp. trop. and sub-trop. Am. 
18 
W. 
