Botanical Survey of India | Flora of India

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Zanthoxylum tomentellum Hook.f., Fl. Brit. India 1: 493. 1875 emend. Babu in Bull. Bot. Surv. India 16: 69. 1974(1977).


Scandent shrubs or trees Up to 10 m high; branchlets velvety-tomentose, armed with scattered, retrorse, brownish 5 mm long prickles. Leaves imparipinnate, up to 30 cm long; petiole and rachis cylindric, armed with retrorse prickles beneath, velvety-tomentose; leaflets 13 - 17, alternate or opposite, ovate to elliptic-oblong, 3 - 8 x 2 - 3.5 cm, coriaceous, glossy above, cuneate and oblique at base, obtuse or acuminate with retuse tip at apex, entire below and glandular-crenate above along margins; midnerve slightly hairy, depressed above, raised beneath; secondary nerves 6 - 14 pairs, horizontally spreading, pubescent beneath; petiolules up to 3 mm long. Inflorescences terminal and axillary, paniculate, up to 15 cm long, velvety-tomentose. Flowers in loose clustures of cymes. Male flowers: Pedicels 1 - 3 mm long, velvety-pubescent. Sepals 4, ovate-triangular, acute to obtuse, ca 2 mm long, puberulent abaxially, margins ciliate. Petals 4, oblong-elliptic, 2 - 4 mm long. Stamens 4, slightly exceeding petals; anthers oblong, ca 1 mm long, yellowish. Pistillodes solitary, ovoid with a subulate end, up to ca 2 mm long. Female flowers: Pedicels, sepals, petals as in male flowers. Staminodes absent. Gynoecium 4-carpellate, carpels ovoid, 2 mm long, glandular-punctate; style short, persistent in fruit as a beak; stigma capitate. Follicles 1 - 4 with 3,2, 1 or 0 persistent abortive carpels, ca 5 mm across, pustular, beaked; endocarp slightly detachable; seeds globose, ca 4 mm across, black, smooth.

Distrib. India: In temperate forests of E. Himalayas at higher elevations. Sikkim and Meghalaya.

Bhutan.

Notes. Similar to Z. oxyphyllum but is distinct from it by having velvety-tomentose indumentum, smaller leaflets with entire or only distally glandular-crenate margins, smaller flowers, and fruits with a persistent beak.




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