GL'TTIFERALES.J 



DIPTERACEiE. 



393 



Ordek CXLI. DIPTERACE^E.— Dipterads. 



Dipterocarpe^, Blume Bijdr. p. 222. (1825); Fl. Javce (1829); Wight and Arnott, Prodr. Fl. Ind. 

 Penins. 1. 83. (1834) ; Endl. Gen. ccxiii. ; Meismr Gen. 35. ; Wight lUustr. 1. t. 36, 37. 



Diagnosis. — Guttiferal Exogem, ivith simple alternate leaves^ large convolute stipules, 

 symmetrical floxoevs, eqidlatcral petals, an unequal, permanent, tcinged calyx, beaked 

 anthers, and a l-celled \ -seeded fruit. 

 Gigantic trees, abounding in resinous juice. Leaves alternate, involute in vernation, 

 with veins rvuining out from 

 the midrib to the margin ; 

 stipules deciduous, oblong, 

 convolute, terminating the 

 branches with a taper point. 

 Flowers usually large ; the 

 racemes termmal and pani- 

 cled, or axillary and sohtary, 

 or sevei'al from the same 

 leaves, or from the axils, 

 often one-sided. Calyx tubu- 

 lar, 5-lobed, unequal, per- 

 sistent, and afterwards en- 

 larged, naked at the base ; 

 aestivation imbricated. Petals 

 hypogynous, sessile, often 

 combined at the base ; aesti- 

 vation contorted. Stamens 

 indefinite, hypogjuous, dis- 

 tinct, or slightly and uTegu- 

 larly polyadelphous ; anthers 

 innate, subulate, opening lon- 

 gitudinally towards the apex ; 

 filaments dilated at the base. 

 Ovary superior, without a disk, 

 3-celled ; ovules in pau's, pen- 

 dulous ; style single ; stigma 

 simple. Fruit coriaceous, 1- 

 celled by abortion, 3-valved 

 or indehiscent, sm'rounded 

 by a calyx having tough 

 leafy enlarged permanent 

 divisions which crown the 

 fruit. Seed single, without 

 albumen ; cotyledons plano- 

 convex, or more commonly 

 twisted and crumpled ; radi- 

 cle superior. 



These trees, which are ap- 

 parently unknown in Europe 

 in a Uviug state, are described 

 by Dr. Wight as deserving 

 cultivation for ornamental 

 purposes, for the sake of 

 their majestic size, handsome 

 forms, the beauty of their 

 clustei'ed flowers, and the 

 richly coloiu*ed wings of their 

 curious fi*uit. They form a 

 remarkable Order, which is 

 one of those whose limits are Fig. CCLXXVII. 



best defined, and yet it appears . .... 



to participate in'the affinities of plants which cannot be brought into its vicmity by any 



Fig. CCLXXVII.— Dipterocai-pus trinervis.— B;m»j<;. a an anther j 6 a perpendicular, c a trans- 

 verse, section of an ovary; d a fruit ; e section of seed of Dryobalanops caraphora ; / its embrjo 

 unfolded. - Gartner. 



