Botanical Survey of India | Flora of India

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Clausena Burm.f.

Shrubs or small trees, unarmed, often aromatic. Leaves alternate, imparipinnate; rachis terete or occasionally marginate or winged; leaflets usually 5 - 11 or rarely 1 - 3 or, up to 35, alternate, oblique and often asymmetric (except terminal one). Inflorescences terminal and/or axillary, paniculate or racemose. Flowers subglobose to oblong in bud, fragrant. Calyx cupular; sepals small, green. Petals glandular, imbricate in buds, cream-white or pale yellowish. Stamens 8 or 10, alternately long and short, or subequal; filaments dilated below, subulate above, glabrous; anthers ovoid, oblong or rhombohedral, often glandular. Ovary entire or lobed, variously pubescent or glabrous, borne on a distinct gynophore, 2 - 5-locular, with usually 2 (sometimes 1) collateral or superimposed ovules per locule; gynophore usually hourglass shaped or cylindric, arising from an annular disk; style cylindric, short or long, or as long as ovary, blending with the ovary or clearly demarcated, caducous; stigma truncate or capitate. Fruit a berry, subglobose to oblong or ovoid, yellow or reddish or black when ripe, 2 - 5 locular, often 1-seeded; pericarp glandular; seeds green, aromatic.

Tropical Africa eastward to Australia through tropical and subtropical Asia and Malasia; 15 species, 7 in India.

Literature. MOLINO, J.F. 994. Revision du genre Clausena Burm. f. (Rutaceae). Bull. Mus. Natl. Hist. Nat. Paris 4 ser. 16. Section B, Adansonia 1: 105 - 153. STONE, B.C. & K.N. NAIR (1994), A new species of Clausena (Rutaceae) from India. Nord. j. Bot. 14: 491 - 493.


1a. Inflorescence exlusively axiliary 1. Clausena anisata
b. Inflorescence terminal and/or axillary (from uppermost leaf axils) 2
2a. Ovary pilose or hirsute 3
b. Ovary glabrous or rarely slightly hairy 5
3a. Leaflets 15 - 23 or up to 35; filaments excavate and papillose at base; gynophore hourglass shaped; ovary hirsute 3. Clausena excavata
b. Leaflets 5 - 9 or sometimes 1 - 3 -foliolate; filaments plane, smooth, dilated at base; gynophore cylindric; ovary pilose 4
4a. Evergreen tree; ovary globose, 5-angled, densely pilose; berries subglobose, downy 7. Clausena lansium
b. Deciduous shrub; ovary subglobose or oblong, entire, sparingly pilose; berries ovoid, glandular-papillose 6. Clausena kanpurensis
5a. Ovary cylindric, ovoid or tetragonal, sulcate, 4-lobed 4. Clausena heptaphylla
b. Ovary lubglobose, profusely glandular-papillate 6
6a. Leaflets rhomboid-obovate, deep black when dry; ovary 3-locular 5. Clausena indica
b. Leaflets oblong-elliptic or lanceolate, yellowish-green when dry; ovary 4 (rarely 5)-locular 2. Clausena austroindica

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