Botanical Survey of India | Flora of India

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Zanthoxylum pseudoxyphyllum Babu in Bull. Bot. Surv. India 16: 66. 1974 (1977).

Shrubs, scandent or climbing, up to 6 m high; branchlets stout, terete, sparsely prickly or unarmed, glabrous. Leaves 3-foliolate to imparipinnate, 3 - 15.5 cm long; petiole and rachis grooved above, slightly prickly beneath, glabrous except the hairy groove; leaflets 3 - 7, opposite or subopposite, elliptic-oblong or obovate, cuneate and oblique or not at base, abruptly acuminate or acute to obtuse and retuse at apex subentire to glandular-crenate along margins, 1.5 - 8 x 0.7 - 5 cm, coriaceous, glabrous; secondary nerves 5 - 10 pairs, prominent; petiolules very short. Inflorescences terminal and axillary, paniculate or racemose, up to 5 cm long, puberulent. Flowers often solitary or in 2 - 3-nate clustures. Male flowers ca 3.5 mm long; pedicels up to ca 1.5 mm long, puberulent; bracts ovate-rounded, less than 1 mm long. Sepals 4, triangular-rounded, 1 x 0.8 mm, with a prominent pellucid gland at tip, midnerve prominent up to the middle, sparsely branched, margins ciliate. Petals 4, imbricate, elliptic-oblong, obtuse, 2 - 3.5 mm long, penninerved. Stamens 4, up to 2 mm long; filaments linear, ca 0.5 mm long; anthers oblong, 1.5 mm long, gland tipped. Pistillodes of 2 or 3 rudimentary carpels, ca 1 mm long. Disk pulvinate, ca 0.5 mm high. Female flowers: Bracts linear-lanceolate, 1 - 1.5 mm long, ciliate. Petals elliptic-oblong, obtuse, ca 2 mm long. Staminodes absent. Gynoecium 4-carpellate; carpels ovoid, flattened-compressed, ca 1 mm long; style short; stigma capitate. Disk same as in male flowers. Fruits not seen.

Fl. April.

Distrib. India: Manipur and Arunachal Pradesh. So far known only from these two states, and report of this species from Arunachal Pradesh constitutes a new distribuhonal record.

Notes. Z. pseudoxyphyllum is very closely allied to Z. oxyphyllum but differs from it in having fewer leaflets (3 -7), shorter paniculate-racemose inflorescence with solitary or 2 - 3-nate flowers. Babu's (1974(1977): 66) description of this species was based on only two staminate collections from Manipur (Watt 6452 A & B in CAL). The description of female flowers added hitherto is from a pistillate flowering specimen from Manipur (Watt 6476 in CAL).

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