Monographs Details: Mouriri cearensis Huber
Morley, Thomas. 1976. Melastomataceae tribe Memecyleae. Fl. Neotrop. Monogr. 15: 1-295. (Published by NYBG Press
Description:Description - Tree to 12 m high with a trunk to 25 cm in diam, glabrous except for the inflorescence; young twigs terete to 4-ridged. Petioles 1.5-4.0 mm long; blades 4.7-13.0 cm long, 3.0-6.0 cm wide, ovate-elliptic to elliptic, acute to medium acuminate or sometimes rather abruptly acuminate at the apex, broadly rounded to acute with 90° included angle at base; midrib plane above, low-rounded to 2-angled below; lateral nerves invisible to obscurely visible above, obscurely to plainly visible below when dry. Midrib xylem tubular, the tube compressed dorsiventrally; stomatal crypts apparently a broadened highly modified Type II with conspicuous papillae on the roof, averaging in a leaf ca 61-140 µ in diam, 30-46 µ high, 20-39 per sq mm (extremes 46-226 µ diam, 27-50 µ high, 19-47 per sq mm); upper epidermis varying irregularly from one to two cells thick in the same leaf, the cells variable in size and shape, most of those contacting the palisade with mucilaginous walls; hypodermis none; free stone cells present only at very base of midvein or petiole in the cortex, the pith irregularly or weakly or not at all sclerified; terminal sclereids columnar, sometimes with a small horizontal central body just above the veinlet level, the sclereid often branching toward the upper surface, less often toward the lower, sometimes not extending below the veinlet level. Inflorescences at leafless nodes of twigs up to 4.0 mm thick and in the lower axils, 1 or 2 per side, each 1-17-flowered, 10.0-23.0 mm long to base of farthest pedicel measured along the axes and with 1-4 internodes in that length; bracts early deciduous, not seen. Upper internodes of inflorescence and lower parts of pedicels minutely puberulent. True pedicels 1.5-3.8 mm long; calyx including inferior ovary 4.4-5.2 mm long when dry, to ca 5.7 mm long when fresh, campanulate; calyx lobes fused to the apex of the flower in bud, enclosing the other parts, splitting apart regularly at anthesis, each then triangular or ovate-triangular and acute, 3.4-3.8 mm long, 1.8-2.5 mm wide; free hypanthium 1.2-1.3 mm long; calyx circumscissile in the free hypanthium ca 2/3 of the way from the hypanthium base to the stamen attachment after anthesis. Petals white or yellowish-white, 3.8-4.0 mm long, 3.4-3.6 mm wide, broadly ovate, broadly acute to rounded with a minute apiculum at the apex, cordate at base on a claw 0.2-0.4 mm long. Filaments 3.0-4.5 mm long; anthers 3.0-3.6 mm long; sporangia ca 1.4 mm long, dehiscing by apical slits; gland 0.3-0.4 mm long, 2.1-2.5 mm from apex of anther when measured from center of gland; cauda 1.7-2.3 mm long. Ovary 5-locular; placentae basal in each locule, the ovules borne on all sides of a short basal column, 3 per locule; style 4.0-5.0 mm long. Fruit edible, reddish, subglobose, slightly squarish as seen in lateral outline, 17.0-20.0 mm high and 17.0-21.0 mm in diam when dry, estimated 19-23 mm high and 19-24 mm in diam when fresh, with a round terminal calyx scar 7.0-11.0 mm in diam. Seeds 2-4(-5?), medium brown, smooth, irregularly ellipsoid, flattened on the contact faces, ca 10.7-12.5 mm long, 6.5-7.8 mm wide, 5.8-6.6 mm thick; hilum basal but angled upward, irregularly elliptic, ca 4.0-5.0 mm long, 3.0-3.4 mm wide.
Discussion:The most distinctive features of this species are anatomical: the irregular upper epidermis and the broad papillose stomatal crypts. These with the short anther sporangia mark the species as the most specialized of its section. Lesser differences are seen in leaf shape, piominence of veins in the dry leaf, and fruit shape.
Maranhão Brazil South America
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