BVTAGE7E. 



393 



to one carpel. Empleuridium, the flowers of which have four petals, 

 but are dioecious, with the fruit of Em/pleu/rum ; finally, Calodendron, 

 with beautiful large flowers, much recalling by their perianth and 

 diplostemonous anclroceum, those of Spiranthera and Dictamnus, but 

 with a gynseceuni exceptionally formed of carpels united into one 

 ovary, with five biovulate cells, to which succeeds a five-celled and 

 loculicidal capsule. 



Boronia serrulata. 



IV. BORONIA SERIES. 



The flowers of Boronia 1 (figs. 422, 423) are very analogous to 

 those of the Diosmas of South Africa, regular, hermaphrodite, and 

 generally tetramerous. The receptacle, usually convex, supports four 

 imbricated or valvate sepals, free or 

 slightly united at the base, four 

 alternate petals imbricated or val- 

 vate, and eight stamens, four of 

 which, oppositipetalous, shorter, are 

 sometimes sterile,- while the four 

 others have a two-celled introrse an- 

 ther, dehiscing by two longitudinal 

 clefts. Within the insertion of their 

 filaments, glandular or ciliate, often 

 dilated at the apex, is seen a more or less thickened disk, entire 

 or four-lobed, surrounding the gynseceum. This is composed of 

 four oppositipetalous, biovulate carpels, formed exactly like those 

 of Diosma. It is the same with the capsular fruit, whose shells, 

 with separable endocarp contain one or two seeds each. Under 

 the coats of the latter a fleshy albumen is found surrounding an 

 axile subcylindrical embryo. Boronia consists of small shrubs 

 from Australia, principally the south-eastern regions. More than 

 some fifty species 2 are actually admitted. The leaves are opposite, 

 simple or imparipinnate, sometimes trifoliolate, with folioles entire 



Fig. 422. 

 Flower (f). 



Fig. 423. 

 Diagram. 



1 Sm., iu Trans. Linn. Soc, viii. 285, t. 5-7. 

 — G.EETN. F., Fruct., iii. 156, r t. 211. — A. Juss., 

 in Mem. Mus., xii. 482, t. 22, fig. 26.— DC, 

 Prodr., i. 721. — SpaCH, Suit, a Baffon, ii. 

 338.— Endl., Gen., n. 6004.— B. H., Gen., 291, 

 989, n. 28.— H. Bn., in Adansonia, x. 302.— 

 Cyanothamnus Lindl., Sioan Riv. Bot., 18. 



—Endl., Gen., n. 6005.— B. H., Gen,, 292, n. 

 29. 



2 Labill., PI. Nouv.-HoU., i. 97, t. 124, 125. 

 — Sieb., in Spreng. Syst., Cur. Pout., 148. — 

 Reichb., Ic. Exot., t. 73, 74. — Sweet, Fl. 

 Austral., t. 19, 48. — Lindl., Swan Riv. Bot., 

 17; in Mitch. Trop. Austral., 298; in Bot. 



