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Pakistan | Family List | Pakistan V. 207 | Asteraceae

14. Xylanthemum Tzvelev, Fl. URSS. 26: 284. 1961; (Engl. transl.) K. Bremer & Humphries in Bull. Nat. Hist. Mus. Lond. (Bot.) 23 (2): 105. 1993; K. Bremer, Asteraceae: 455. 1994.

Tanacetum L. sect. Xylanthemum (Tzvel.) Podlech in Rech. f., Fl. Iran. Comp. IV. 158: 137. 1986.

Perennial, basally much woody bifurcate hairy shrublets with virgate, ultimately leafless branches. Leaves alternate, pinnatisect. Capitula homogamous, usually discoid, on solitary long peduncles forming pesudocorymbs. Involucre ± copular, multi-seriate, outermost series of phyllaries smallest. Receptacle flat, glabrous. Florets bisexual, with tubular 5-lobed corolla, lobes deltoid ovate.Anthers without basal appendages, apically with lanceolate-ovoid appendages. Cypselas oblong, 5-6-ribbed, homomorphic, beset with sessile glands and myxogenic cells. Pappus an adaxial auricle or a corona of several adaxial scales.

A small genus of c. 9 species, distributed in Iran, Central Asia, Afghanistan and Pakistan.

1 Plants usually 30 – 40 cm tall. phyllaries hyaline membranous on margins. Endemic to NW Balochistan.   3 Xylanthemum macropodum
+ Plants usually low-growing. Phyllaries brown membranous on margins. Plants widespread in Northern mountains.   (2)
2 (1) Leaves rigid. Outer and median phyllaries dark brown-margined, inner light brown and lacerate at the dilated apices. Peduncles more than 10 cm long.   1 Xylanthemum fischerae
+ Leaves soft, not rigid. Outer and median phyllaries dark brown-margined, inner ciliate at the apices. Peduncles less than 10 cm long.   2 Xylanthemum pamiricum

Lower Taxa


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