208 NATURAL mSTOBY OF PLAINTS. 



the slightly ruminated albumen. The genus Annxagorcn consists 

 of trees or shrubs, of which half a dozen species are known, 

 divided between tropical Asia' and tropical America.^ The leaves 

 are of very variable consistency ;' and in their axils are the flowers, 

 solitary, or in two- or few-flowered cymes.' We may define Jnaxa- 

 gorea as Unona with dehiscent fruits. 



Dixopnhimy possesses a perianth with dimerous verticils, with the 

 sexual organs of a Unona of the section Pol^alt/iia, to which it 

 bears the same relation as Tetrnpetalum does to Ucaria. The 

 calyx consists of two valvate sepals. The four petals are narrow, 

 linear-spathulate, bent, and inclining inwards at the apex, while the 

 bases are joined by a sort of common ring ; the only known species of 

 this genus is D. anomalam^ a shrub from Borneo with alternate thick 

 feather- veined leaves, and solitary terminal flowers on long peduncles. 



Bocnr/rri' may be considered as Unona, with small flowers, but with 

 the stamens of the Mi/iusra. Its characters are, on the whole, those 

 of Unona : a gamosepalous calyx" of three divisions, and a corolla of 

 six valvate petals, which are sometimes those of a true Unona, 

 sometimes those of certain species of Poli/alt/iia, McIoJorum, or 

 Trigyncia.^ Sometimes the contraction seen at the base of the 

 inner petals becomes so marked that this corolla, though less 

 elevated, becomes very like that of several Mitrcphorea. In about 

 half the Indian species of this genus, which have been termed 

 AJjjhonHi'a, the carpels and stamens are very numerous.'" The former 



• Walp., J{pp. i. 80; Ann. iv. 72; vii. 55. — with blunted angles and witliout any dopression on 

 MlQ.. ri Ind.-Bat., i., p. ii. 19; Ann. Mum. the cdpes. That of B. alha A. S. M. {loc.cit.) 

 Lvgd. Bat., ii. 22, t. 2. is a cii])uliforni sjic with only three short teeth on 



'^ Benth., Hook. Juurn., v. 8; Jotirn. Linn. the edge. In B. riri(li.<i A. S. H., it is an equi- 



Soc.,v. 71.— Maiit.. Fl. Bras. Anonac, 40, t. 5. lutcnd triangle with the vertiees not blunt. In 



* Those of most American species, except A. B. heterantha H. Bn. (Adantonia, viii. 173), 

 prinoidex, become very thick and coriaceous. and lutca, Hi>OK. <t Tn. (Ft. Jnd.,\. 153), the 



* They may l)e slightly extra-axillary. Those sepals, united at tlie base, are separated from 

 of A. ncuminntd sonietinies form a uniparous two- one anotlier by tliree deep cleftj*. 



flowered cyme, the two (lowers which are close ' In B. allia A. S. II., those of the outer cn- 



together, being of different generations. rolhi are oval-acute, and the inner ones are similar 



' Hook. F., Linn. Trans., xxiii. 156. — II. II., at tlie apex, but hollowed out on each side near 



Oen., 25, n. 16. the base. In Ii. riridis A. S. II. they are all 



• Hook. F., Inc. cit., t. 20. MUiiiar, concave and oval, as they are in B. vm-- 

 7 A. S. H., Fl»r. Bran. j1/^r., i. l-l, t. !). — A. ruroxa auil cftne.tren.f. In B. tnutliftorn iUc c\a^b 



IK.'., .Mi'in.. :U». — SPACM, Suit, i) Ihijf., vii. 511. of the inner jK-t^ls are hanlly indicaltHl. 

 — Maut., Ft. Brax. , Anoiifir., \l,i. H. — Kmh.., '" Their nundier is indetinito in Atphomea 



Oen., n. l/OU.— H. H., (}tn., 21). n. 3'J (ex jwirt.). lutea and vrnlricoxa, antl in Uraria Badn/amba 



— \l. l^V.,Adatuionia, \\\\. Kul.'.i'.iH. — Aljihonxra Uuxn. (which appwirs identical with //. rr»»- 



HooK. F. & TiloMH., Fl. Ind.,\.\b'i. — H. H., /ri>tt*<i), plants all of which we refer to the genus 



(irn. 2'.>, n. 37. Bocai/Ki. Hut we Nhall see that in other «iHTii'4 



" That of B. remicona {Alphunifa rrrrurota of AI/>/ioii.'i)ii the number of eairi>els in but unml' 



IIuoK. &. TlloMS., ex Thw.) \h like a triimgle (hough the stauu-us may Ih' very lunnerous. 



