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3. Hypericum sect. Roscyna (Spach) R. Keller in Engler & Prantl, Nat. Pflanzenfam. 3(6): 211. 1893.
黄海棠组 huang hai tang zu
Roscyna Spach, Ann. Sci. Nat., Bot., sér. 2, 5: 364. 1836.
Herbs, perennial, glabrous, without dark glands. Leaves without abaxial glands. Bracts and bracteoles deciduous or persistent. Sepals free, entire. Petals and stamens usually persistent after anthesis; petal apiculus short or absent. Stamen fascicles 5, free or occasionally apparently 4 (one pair united), anthers dorsifixed. Styles (4 or)5, partly united or more rarely free. Capsule valves longitudinally vittate; seeds not or apically winged.
Two species: Siberia, E Asia, and E North America; two species (one endemic) in China.
Lower Taxa
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