Chrysosplenium


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Related to Chrysosplenium: golden saxifrage

Chrysosplenium

 

(golden saxifrage), a genus of perennial herbs of the family Saxifragaceae. The leaves are alternate or opposite, petiolate, and entire. The small, green or yellowish flowers are in apical cymose inflorescences surrounded by bracteal leaves. The perianth consists of a four-parted calyx, and the fruit is a capsule.

There are more than 50 species of golden saxifrage, distributed in nontropical regions of the northern hemisphere and in the temperate zone of South America. The USSR has about 25 species, growing in the arctic, forest and alpine mountain zones. The most common species is C. alternifolium, which grows along damp, shady forests, ravines, and the shores of rivers and streams; its seeds are poisonous. C. alternifolium and C. oppositifolium are cultivated as ornamentals.

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The position of Chrysosplenium and a proposed sister relationship
multiseriate trichomes; Chrysosplenium lacks trichomes.
possible plesiomorphy of Chrysosplenium and Gunnera is the growth of
including Chrysosplenium (Savile 1975; Soltis et al.
Trichome placement: (0) on the margin only; (1) on the lower surface veins and the margin; (2) on veins of both surfaces and margin; (3) on veins of both surfaces, margin, upper surface, and areoles; (4) on the veins and areoles of both surfaces, plus the margin; (5) on the veins, areoles, and sinuses; (6) Gunnera herteri N/A; (7) Trochodendron N/A; (8) Tetracentron N/A; (9) Cercidiphyllum N/A; (A) Aucuba N/A; (B) Disanthus N/A; (C) Ascarina N/A; (D) Hamamelis N/A; (E) Chrysosplenium N/A; (F) Griselinia N/A; (G) on the petiole only; (H) Myrothamnus N/A.
1984); Saxifraga (Erdtman, 1966; Ferguson & Webb, 1970); Chrysosplenium (Heusser, 1971; Gupta & Sharma, 1986); Cnestis (Dickison, 1979), Vitaceae (Erdtman, 1966); Myrothamnus (Zavada & Dilcher, 1986; Kubitzki, 1993b; Wanntorp et al.
Chrysosplenium often has a single flower, but, because some species have compound inflorescences of the corymb type (Ohwi, 1965), we have coded this as basic to the genus, assuming that the solitary flowers are a reduced derivative.
Phylogenetic relationships and evolution in Chrysosplenium (Saxifragaceae) based on matK sequence data.