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FNA | Family List | FNA Vol. 8 | Saxifragaceae | Saxifraga

18. Saxifraga bracteata D. Don, Trans. Linn. Soc. London. 13: 367. 1822.

Saxifraga laurentiana Seringe; S. rivularis Linnaeus var. laurentiana (Seringe) Engler; S. vaginata C. Presl ex Sternberg

Plants solitary or in usually loose tufts, not stoloniferous, weakly rhizomatous, (with bulbils). Leaves basal and cauline; petiole ± flattened, 10-70 mm, (± hairy); blade reniform, 5-7(-11)-lobed (lobes obtuse, sometimes acute), (5-)7.4-11.2(-20) mm, slightly fleshy, margins entire, sparsely glandular-ciliate or eciliate, apex rounded to obtuse, surfaces glabrous or sparsely short stipitate-glandular. Inflorescences 2-6(-29)-flowered, capitate thyrses, sometimes solitary flowers, (flowers subsessile), (3-)5-15(-18) cm, densely tangled, reddish brown-hairy; bracts (5-10), petiolate, (3-7-lobed, densely surrounding inflorescence). Flowers: (hypanthium U-shaped in longisection); sepals erect, oblong to ovate, margins ± glandular-ciliate, surfaces glabrous or sparsely short stipitate-glandular; petals white, not spotted, ± broadly elliptic to obovate, 2-5(-6.5) mm, ± equaling sepals; ovary ca. 1/2 inferior. 2n = 26 (Russian Far East).

Flowering summer. Rocky ledges and slopes, coastal; 0-500 m; Alaska; e Asia (n Japan, Russian Far East).


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