Masoala madagascariensis Jum.

국표에 없다.

DistributionMarojejy, Masoala and Mananara.General DescriptionSolitary palm. TRUNK 3.5-10 m, 30-35 cm diam. when covered in sheath remnants, 14-20 cm diam. for clean trunk; internodes 2-5 cm, pale brown; nodal scars faint; wood hard. LEAVES 20-31 per crown, porrect to spreading, held in shuttlecock mode, stiff, 3-4 m long, tending to be held on edge, marcescent, litter-accumulating at base, with aerial roots penetrating the litter; sheath 45-50 cm long, open, rather undulate, bright green, glabrous or with scattered brown indument, with large lateral auricles to 2 m long (JD6738) running into the reins or scarcely auricled (JD6770), long-attenuate into glabrous green apparent petiole, to 80 cm long or absent, proximally 25 cm wide, distally 5.5 x 2.5 cm diam., flat or slightly convex adaxially, with somewhat embedded scattered scales; rachis c. 3.9 m long, in mid-leaf c. 1.4 x 2.2 cm diam., keeled, abaxially with scattered small red glands/scales; leaflets mostly regular, plane, stiff, ± porrect, 55-70 on each side of the rachis, bright green, the most proximal pendulous and in groups of 4, proximal 71-117 x 1-4.5 cm, median 65-88 x 2.7-5.6 cm (interval 3-6 cm), distal 28-66 x 2.2-2.8 cm, main veins 4 rather faint, next to a clear midrib, abaxially on the midrib with a few large (6-12 mm long) red-brown laciniate ramenta, and on the minor veins with scattered small red glands, apices attenuate and slightly bifid, the distal pair joined for 3-5 cm and with acute to dentate apices less than 1 cm wide. INFLORESCENCE inter-foliar, arching and then erect, 0.7-1.3 m long, branching to 2 orders at base, with arching rachillae; multiple inflorescence primordia once observed (JD6738); peduncle 50-120 cm long, 2.5-8 x 1.3-4 cm diam., densely red-pubescent; prophyll 50-98 x 9-16 cm, borne at 8-10 cm above the base of the peduncle, bright pale green, tomentose when young, with scattered brown scales when older; peduncular bract 80-104 cm long, c. 8 cm wide, apparently circumscissile, not or hardly beaked, with few scattered scales; non-tubular peduncular bracts at regular intervals, spirally inserted, the proximal 17-22 x 6.5-8 cm, the 4 to 5 subsequent ones 0.5-7 x 3-7 cm and varying from narrowly triangular to a small ridge; rachis c. 90 cm long with 15-35 first order branches, these proximally 1.2-3 x 0.6-1.4 cm, with up to 7 second order branches; rachillae (9-) 20-43 cm long, 9-12 mm diam. when fresh, as little as 6 mm diam. when dried, glabrous or nearly so, with triads in pits, the young flowers green. STAMINATE FLOWERS with the sepals 2.8-3.8 x 2-3.3 mm, keeled, acute; petals in bud 2.8-5 x 2.6-3.8 mm, fleshy; stamens slightly biseriate (offset 0.3 mm) with the antesepalous filaments flatter and to 0.8 mm wide, and the antesepalous ones triangular in cross-section (to 1.2 mm wide), filaments 1-2 mm long (connate at the base for up to 0.5 mm), anthers 2.3-3.5 x 1-1.2 mm, dorsifixed, with parallel locules, latrorse; pistillode cylindrical, 2.3-3.5 x 0.4-1.2 mm. PISTILLATE FLOWERS with the sepals 5-6.5 x 4.5-7 mm; petals 6-8.5 x 7-9.5 mm; staminodes minute, 6 (no sign of ring), 0.3 mm high and flat; pistil at anthesis 11-18 x 6-10.5 mm, the trifid apex 2-3.5 mm high. FRUIT green when young, when mature yellowish brown, subglobose with pronounced terminal stigmatic boss, 24-25 x 18-19 mm; mesocarp fleshy, 1.5-2 mm thick; endocarp; fibrous, thick, adherent to the seed, forming a hard layer around it, with parallel, free fibers reaching to the apex of the style boss. SEED depressed globose, 10-11 x 12-15 mm with homogeneous endosperm and basal embryo.

 

 

Masoala madagascariensis Jum. | Plants of the World Online | Kew Science

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