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Filago Linn.


Description from Flora of China

Herbs, annual. Stems with fibers in phloem, without resin canals, without pericyclic cambium. Leaves alternate, sessile, tomentose, eglandular. Capitula heterogamous, disciform, few together, surrounded by a ray of leaves. Phyllaries few seriate, cartilaginous or apically minutely papery, monomorphic, monochromous, brownish, transparent, not enclosing florets; stereome entire. Receptacles filiform, fragile; paleae subtending outer female florets, 3-5-seriate, imbricate, scarious. Female florets purple, filiform, outnumbering disk florets. Disk florets bisexual, or functionally male; corolla purple; corolla lobes 4, erect; veins ending below lobes. Anthers ecalcarate, with short tails; endothecial tissue polarized; apical appendage flat, as wide as thecae. Achenes brown, monomorphic, terete to compressed, cylindric to obovoid, with 2 vascular bundles, sparsely hairy with short, clavate, myxogenic twin hairs; epidermis smooth. Pappus monomorphic, of free scabrid capillary bristles in 1 row, basally with patent cilia; apical cells acute. x = 9, 13, 14.

About 46 species: N Africa, SW Asia, Atlantic islands, Europe; two species in China.

(Authors: Chen Yousheng (陈又生); Randall J. Bayer)


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