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10. Krascheninnikovia Gueldenstaedt, Novi Comment. Acad. Sci. Imp. Petrop. 16: 551. 1772.

驼绒藜属 tuo rong li shu

Eurotia Adanson.

Shrubs or subshrubs, covered with stellate and dendroid hairs in combination with simple (unbranched), uniseriate hairs. Leaves alternate, solitary or in fascicles, petiolate to subsessile; leaf blade flat, linear-lanceolate to ovate, base cuneate, rounded, or subcordate, margin entire, apex obtuse or acute. Flowers unisexual (plants monoecious or dioecious). Male flowers several in glomerules, forming an interrupted spike or subcapitate inflorescence, without bracts; perianth segments 4, ovate or elliptic, membranous, abaxially hairy, basally connate; stamens 4; anthers oblong; filaments linear, exserted. Female flowers axillary, 1 or 2 together; bractlets 2, united into a tube in proximal half or at base (here termed “female floral tube”), compressed, ellipsoid or obovoid, abaxially 4-fascicular villous or shortly hairy in fruit; perianth absent; ovary sessile, ellipsoid, hairy; style short; stigmas 2, pubescent. Utricle ellipsoid or narrowly obovoid, compressed; pericarp membranous, free from seed. Seed vertical; testa membranous; embryo semi-annular or horseshoe-shaped; radicle inferior.

Six or seven species: mainly in Eurasia, one or two species in W North America: four species (one endemic) in China.

Much controversy surrounds the nomenclature of this genus. The widely applied name Ceratoides Gagnebin should be rejected in favor of Krascheninnikovia. When establishing the new genus Ceratoides, Gagnebin (Acta Helv. Phys.-Math. 2: 59. 1755), instead of citing a description, cited a pre-Linnaean work by Tournefort, in which Ceratoides included the annual plant now known as Ceratocarpus arenarius Linnaeus, the type of Ceratocarpus Linnaeus. Consequently, Ceratoides in the strict sense is a nomenclatural synonym of Ceratocarpus.

1 Female floral tube 2-auriculate apically, abaxially shortly hairy in fruit, or (in var. longipilosa) 4-fascicular long villous; plants usually low cushion-shaped with prostrate or ascending branches; petiole comparatively long, clearly separated from leaf blade (alpine areas).   4 K. compacta
+ Female floral tube 2-cornute apically, abaxially 4-fascicular villous in fruit; plants not cushion-shaped, branches normally ascending to erect; petiole short or nearly absent, not clearly separated from leaf blade.   (2)
2 (1) Female floral tube 1-2 × as long as free, 2-cornute part; leaf blade linear to linear-lanceolate, lateral veins obscure.   1 K. ceratoides
+ Female floral tube 4-6 × as long as free, 2-cornute part; leaf blade lanceolate, ovate, or oblong-ovate, lateral veins prominent.   (3)
3 (2) Leaf blade ovate or ovate-oblong, base cordate; female floral tube 4-fascicular villous at base in fruit.   2 K. ewersmannia
+ Leaf blade lanceolate or oblong-lanceolate, base broadly cuneate or rounded; female floral tube 4-fascicular villous near middle and distally in fruit.   3 K. arborescens

Lower Taxa


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