crenature is a conspicuous pellucid gland; there is also a narrow, 

 pellucid margin round the whole leaf. Peduncles about as long as the 

 leaf, axillary and terminal, chiefly from the superior leaves, single- 

 flowered, often (but not always) bearing a pair of small opposite leaves 

 or bracteas above the middle, each of which has a flower in its axil. 

 Beneath the calyx are 2 or 3 pairs of small imbricated bracteas. Calyx 

 of 5 ovate-acuminate leaflets, green, tinged with purple. Corolla of 5 

 ovate petals, purple in bud, blush-coloured when fully expanded. 

 Stamens 5, at first erect, then recurved, about as long as the petals. 

 Filaments slightly villous. Anthers oblong. Barren filaments 5, lan- 

 ceolate, white, rather villous, tipped with a gland, the lower part erect, 

 the upper half spreading. Hypogynous disk, an annular, dark green 

 gland. Ovary very short, abortive (?) covered with 5 lanceolate, fleshy, 

 slightly spreading appendages. Style filiform, curved. Stigma minute. 

 Hooker. One of the plants whose leaves are collected in South 

 Africa by the Hottentots under the name of Bucku. They are found 

 to be an excellent aromatic stomachic and very efficacious as a diuretic. 

 The infusion is much praised as a remedy in chronic inflammations of 

 the bladder and urethra and in chronic rheumatism. Several species are 

 collected by the Hottentots according to Thunberg, especially B. betu- 

 lina and pulchella, and even Adenandra uniflora, to which some Aga- 

 thosmas and many others may no doubt be added. Sir W.Hooker takes 

 this as the one to which preference is given. 



437. B. serratifolia Willd. 1. c. Diosma serratifolia Hot. 

 mag. t. 456. Cape of Good Hope. 



Leaves linear-lanceolate, acuminate, serrulated, smooth, glandular at 

 the edges, 3-nerved. Flowers lateral, white, upon short axillary bracteate 

 peduncles. The leaves of this are commonly sold in the shops as 

 Bucku leaves. 



438. B. crenata Eckl. and Zeyhar. enum. i. 102. D. crenata 

 DC. prodr. i. 714. Lodd. Sot. cab. t. 404. copied in S. and C. 

 t. 121. Cape of Good Hope. 



Leaves ovate and obovate, acute, serrated, dotted, glandular at the 

 edge. Flowers pink, terminal, on short lateral leafy branches. This is 

 the sort of Bucku to which De Candolle applies the name of D. cre- 

 nata, and which is figured by Messrs. Stevenson and Churchill as the 

 true officinal plant. 



ZYGOPHYLLACE^l. 



Nat.syst. ed. 2. p. 133. 



ZYGOPHYLLUM. 



Calyx deeply 5-parted, rather unequal. Petals equal to the se- 

 pals in length, or larger, unguiculate. Stamens 10, somewhat 

 unequal, scaly at the base. Ovary 5-cornered, 5-celled, placed on 

 a short convex or concave receptacle ; the cells containing 2 or 

 213 p 3 



