Botanical Survey of India | Flora of India

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Zanthoxylum burkillianum Babu in Bull. Bot. Surv. India 16: 55. 1974 (1977). Z. hamiltonianum auct. non Wallich ex Hook.f. 1875: Burkill in Rec. Bot. Surv. India 10: 253. 1924.


Shrubs, climbing or straggling; branchlets armed with scattered, retrorse, ca 3 mm long prickles. Leaves imparipinnate up to ca 30 cm long; petiole and rachis terete, glabrous, prickly; leaflets 7 - 9, alternate or subopposite, oblong or elliptic-oblong, acute to cuneate or obtuse at base, oblique or not, acuminate at apex, acumen 0.5 - 1 cm long, retuse at tip, margins entire, cartilaginous, 6 - 9 x 4 - 6 cm, chartaceous to coriaceous, glabrous, glossy above, pale beneath; secondary nerves 8 - 20 pairs, prominent, horizontally spreading. Inflorescences paniculate, axillary, ca 12 cm long. Male and female flowers not seen; fruiting pedicels stout, 4.5 mm long. Follicles 2 - 4 with 2, 1, or 0 persistent abortive carpels, globose, ca 1 cm across, pustular.

Distrib. India: Evergreen thickets of E. Himalayas. Arunachal Pradesh.

Endemic.

Notes. This species is so far known only from its type collection. It appears to be closely related to Z. nitidum especially in general appearance, but is different from that species in having alternate or subopposite leaflets with conspicuous cartilaginous margins and in its larger fruits. However, glabrous condition described by Babu (1974) as a delineating character does not hold good because of occasional occurrence of glabrous forms in Z. nitidum. Babu further observed that Z. burkillianum is also related to Z. dissitum Hemsl., a Chinese species but the latter is characterized by shorter inflorescences and follicles with winged suture.





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