954 LXXV. SAPOTACE^. [Lucuma. 



affixed to the corolla-tube opposite the lobes ; filaments very short and broad. 

 Anthers lanceolate or ovate, cells distinct or confluent atthe apex, of tener, lateral 

 or introrse dehiscent. Staminodia often 6, small, linear or scale-like. Ovary 

 densely villose, rarely glabrous, 2 to 5-celled ; style conical or subulate. Berry 

 globose-oblong, fusiform or narrow-incurved ; pericarp fleshy, very thick or thin. 

 Seeds 5 or fewer by abortion, ovoid or oblong, often compressed, hard and 

 glossy ; hilum lateral ; albumen none ; cotyledons thick ; radicle short. — Trees 

 or shrubs with a milky sap. Leaves very often coriaceous. Flowers axillary or 

 at the nodes, in clusters, sessile or shortly pedicellate. 



The greater number of the species of this genus belong to South America, Brazil, Chill, 

 Mexico, and the West Indies. 



Leaves densely hoary on under aide. Fruit subpyrifarm, 4-celled, 

 sessile, 1 to 2in. long, maturing 1 to 3 seeds, covered with dense light- 

 brown short stiff hairs 1. L. Unmackiana. 



Leaves more or less tomentose, or villous on under side. Fruit nearly 



sessile, lin. long, ovoid. Seed solitary ; hilum broad-linear ... 2. L. sericea. 



Leaves glabrous. Fruit glabrous, ovoid, 1 to Ij^in. long, maturing 1 or 

 2 seeds, contracted at each end. Peduncles Jm. long 3. L. galactoxyla. 



Leaves tomentose on under side. Fruit 1-seeded, almost globose, lin, 

 or more in diameter, purple, apex umbonate. Seed more tljan lin. in 

 diameter ',........'.... 4. I/. Amorphosperma. 



Leaves glabrous, except when young. Fruit oval-oblong, slightly 



tapering at the base ... . . 5. L. chartacea. 



1. li. Unmackiana (after Theodore Unmack). Tree of medium size. Ba,rk 

 hard, dark-coloured, about Jin. thick, deeply fissured in straight lines about ^in. 

 apart. Branohlets, young growth and under side of foliage more or less densely 

 clothed with a hairy or rusty lomentum. Leaves coriaceous, broadly ovate, 

 tapering to a petiole of 2 or 3 lines, apex abruptly acuminate, 2 to Sin. long, 

 1^ to 2in; broad, primary lateral nerves parallel, rather close and regular, and 

 with the smaller reticulations prominent on the upper face. Calyx-segments 4, 

 about 3 lines long, ovate-lanceolate, 2 outer ones silky-hairy on the outer side, 

 2 inner ones with broad scarious margins, the centre or part exposed in the bud 

 silky like the outer segments, all glabrous on the inner face. Corolla glabrous, 

 urceolate, slightly exceeding the calyx, the 4 blunt lobes shorter than the tube. 



' Stamens 4, attached in the centre of and in a line with the base of the lobes, 

 not exserted ; filaments free, scarcely longer than the anthers. Fruit axillary, 

 sessile, oval to pyriform, probably when ripe 2in. long, densely covered with stiff 

 bristle-hairs of a light-brown colour, which are removed by the slightest touch. 

 Cells 4, sometimes only 1, and seldom 3 maturing seed. 

 Hab.: Musgrave E. T. Station, Cape York Peninsula, Geo. Jacohton. 



The flowers are described from a few which were found at the base of the fruits, and these 

 latter were also immature ; and in all examined the seeds had been destroyed by insects. 



Wood of a reddish colour, tough and elastic; the sapwood very scanty; grain close, firm, 

 and easy to work. — Bailey's Cat>, Ql. Woods No. 263b. 



2. Ii. sericea (silky), F. r. M. Fragm. vii. 112. " Mongo," Mount Cook, 

 Both. A shrub, flowering when only a few feet high ; bark grey, smooth. 

 Leaves flat, somewhat thick, coriaceous, ovate or orbicular-ovate, very shortly 

 petiolate, often between 1^ and 2^in. long, the under side densely clothed with 

 a rusty or hairy tomentum. Flowers in axillary fascicles. Calyxes about 2 

 lines long, silky, rusty outside ; segments ovate-lanceolate, inside glabrous, 2 

 outer 3 inner all incurved. Corolla green ; tube long as the ' calyx, glabrous, 

 cylindrical ; lobes imbricate, the outside moderately appressed-pilose, inside 

 glabrous, lanceolate-deltoid, almost acuminate ; scales at the throat 5, narrow 

 lanceolate or elliptical, bearded at the top. Anthers sessile at the top of the 

 corolla-tube, ovate-oblong, somewhat acute, ^ line long, extrorse. Ovary silky. 



