316 



L. COMBEETACEiE 



[Anogeissus 



A large tree with hanging branches, branchlets and underside of full grown 

 1. softly pubescent. L. lanceolate, acuminate, blade 1-3, petiole \ in., sec. n. 

 6-8 pair. El. heads \- f in. diam., on peduncles, which as a rule are as long 

 as or shorter than the diameter of the flower-head. Fr. generally broader than 

 long. 



Chanda district C.P. Northern Circars. Chittagong hill tracts. Burma, Upper and 

 Lower. Fl. Feb.-March. A. phillyremfolia, Heurck & Muell., PL Brit. Ind. ii. 451, is 

 a variety with narrower more glabrous 1. and smaller fl.-heads, in the dry region of the 

 Irawaddi valley between Prome and Mandalay, analogous to the variety of A. sericea 

 on the dry hills of Merwara. 



Ordee LI. MYRTACEjE. Gen. PL i. 690. 



Trees or shrubs, 1. simple, generally quite entire, either opposite (rarely 

 alternate) with translucent glands (Myvtacece proper) or alternate without 

 glands (Lecythidacece). Stipules 0. El. regular, generally bisexual. Ovary 

 2- or more celled, enclosed in and generally entirely adnate to the calyx-tube. 

 Petals 4 or 5, imbricate in bud. Stamens numerous inserted with the petals 

 in the mouth of the calyx-tube or on the disk lining it. Fruit usually fleshy, 

 iu some genera a capsule. 



Myrtacece comprise two distinct groups, correctly treated in Engler u. Prantl iii. 7. 

 26, 57, as separate orders. Myrtacece proper have cavities, containing ethereal oil, lined 

 with small thin-walled cells, in leaves, branchlets and generally in all green parts, as 

 a rule immediately under the epidermis. In leaves these oil cavities may often be seen 

 as translucent points. Further there are strands of phloem in the circumference of 

 the pith, usually without thick-walled bast fibres. Apart from the med. rays, which 

 are always narrow, parenchyma does not form an inrportant element in the wood. 

 Lecythidacece. have no oil cavities and there is no phloem in the pith, transverse bars of 

 wood parenchyma between the rays are not uncommon. The chief character, however, 

 of the last-named order is that the leaf traces (vascular bundles) which enter the petiole 

 separate from the central cylinder some distance below the insertion of the leaf. Hence 

 the transverse section of a branchlet shows, as is the case in Dipterocarps, a number of 

 vascular bundles in the bark. In the petiole and midrib these vascular bundles do not 

 coalesce, hut remain distinct. 



A. Myrtacece proper. Leaves opposite, rarely alternate, gland-dotted. 



I. Leaves as a rule opposite, penninerved. 



Calyx 4-lobed, ovary 2-celled, seeds one or few 

 Calyx 4-5-lobed, ovary 4- or 5-celled, seeds several 



Peduncles 1-flowered 



Fl. paniculate 



Calyx closed in bud, splitting irregularly, seeds 

 numerous 



1. Eugenia. 



Myrtus (p. 326). 

 Decaspermum (p. 326). 



II. 



III. 



Leaves opposite, 3 longitudinal nerves. 

 Ovary 1-celled, ovules numerous on parietal 

 placentas ........ 



Ovary 3-6-celled, 1. tomentose beneath . 



Leaves (of older plants) alternate. 

 Calyx truncate, the orifice closed in bud by a cap 



(operculum) formed of the concrete petals 

 Calyx 5-lobed. 



Stamens free 



Stamens in 5 bundles, opposite the petals. 

 Leaves penninerved ..... 



3-7 longitudinal nerves ..... 



Psidium (p. 326). 



PiHODAMXIA (p. 326). 



Rhodojiyhtus (p. 326). 



2. Eucalyptus.' 

 Leptospermum (p. 328). 



3. Tristaxia. 

 Melaleuca (p. 329). 



B. Lecythidacece. Leaves alternate, not gland-dotted. 



All stamens fertile, fl. in spikes or racemes . . . 4. Barrixgtonia. 

 The stamens of the exterior and interior circle with- 

 out anthers 5. Careya. 



The stamens of the inner circle only without anthers. Planchonia (p. 332). 



