488 NATURAL IIIS'IORY OF PLANTS. 



serted outside a more or less developed glandular disk, are 

 formed of a free filament and a bilocular introrse anther, dehiscent by 

 , two longitudinal clefts,^ The gynteeeum is superior ; its ovary, with 

 five oppositipetalous cells, is surmounted by a style, with stigmatiferous 

 head more or less distinctly divided into lobes corresponding to the 

 cells of the ovary. In the internal angle of these is seen a placenta 

 supporting two vertical series of anatropal descendent ovules.^ A 

 distinct genus has been made of the American species, the petals of 

 which are inserted in a manner quite peculiar.^ A vertical projecting 

 rib, borne below by the middle of the internal face, unites them 

 to the elongated receptacle of the flower, so ns to form inside 

 each of the calycine divisions a deep well, similar to what in the 

 Pclar(/07ihims * ai'O called "adherent spurs." The fruit is a septifragal 

 capsule opening from top to bottom (fig. 480) in five coriaceous or 

 membranous panels subdivided into two slight blades. The seeds are 

 prolonged, on one side only, or on both sides in the species of the old 

 world,^ in imbricate fragile membranous wings ; they enclose under 

 their coats a fleshy albumen, of little thickness, enveloping an embryo 

 with superior radicle and flat cotyledons, almost foliaceous. A dozen 

 species of Cedrela " are known, shrubs from the tropical regions of 

 America, Asia, and Australia. The wood is handsome, coloured, 

 odorous ; the leaves are alternate, imparipinnate, and the flowers are 

 collected at the summit of the branches and in the axils of the 

 leaves in ramified clusters of cymes. 



Chloro.rylon., an Indian tree, with pinnate leaves, approaches Cedrela^ 

 being distinguished by its diplostemonous androccum and trilocular 

 ovary, set at the base in a thick annular disk. The fruit is capsu- 

 lar, trilocular, but loculicidal. The species of Flindersia^ which are, 

 on many accounts, abnormal in this group, have, however, the recep- 

 tacle and imbricate petals of 67//(/ro.i7/foM. But in the di])lostemonous 

 androceum, the oppositipetalous pieces are often sterile, represented by 



■ H. (MoitL, Ann. Sc. Nat. scr. 2, iii. 336) « E. ctPAv. Fl. P«-. iii. 9.— Eoxb. PI. Coro- 



(Icscrilies the pollen grains as " ovoid ; fourfold ; maud. t. 238. — RoiLE, Hhnal. t. 25. — Bl. Bijilr, 



ill water ovul witli four bandfj. C. oi/orala." 202.— A. S. H. Fl. Bras. Mer. ii. 85, t. 101. — 



- With double coats. Miq. Fl. Ind.-Bat. i. p. ii. 548 ; Suppl. i. 197. 



' CVy/chsMill. (E.MiL. /or. fi^ a). — TuRcz. Bull. Mnsc. (I8S8), i. 41.— Guiseh. 



■' See p. 7, fiR. 15. FL Brit. W.-Iiid. 131.— Wight, loon. t. 161.— 



* Tuuiia IvOiM. Syn. 131. — Citreracea Jon. F. Miell. Fragm. i. 4. — Benth. Fl. Aw.ilral. 



Asiat. lits. iv. 281. — Siirmus Eumth. Ileri. i. 387.— Tr. Ami. Sc. Nat. ser. 5, .\v. 377. — 



Amboiii. iii. 126. Walp. litp. i. 430 ; Ann. y'n. 500. 



