Overview

Distribution

National Distribution

Canada

Origin: Unknown/Undetermined

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

United States

Origin: Unknown/Undetermined

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

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WC Hebei (Xiaowutai Shan), S Jilin (Fusong Xian), E Nei Mongol, N Ningxia (Helan Shan), Qinghai, S Shaanxi (Taibai Shan), N Shanxi (Ningwu Xian), W Sichuan, Xinjiang (Bogda Shan), Xizang, NW Yunnan [India, Japan, Korea, Mongolia, Russia; Europe, North America].
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Distribution: Forest and Arctic zones of W. & E. Siberia; N. America; W. Asia; Alps of Europe; Himalayas & W. Tibet, from 4600-5700 m.
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Physical Description

Morphology

Description

Stem branched or simple, 6-25 cm tall, glandular pubescent, with conspicuous, red or brown bulbils in axils of cauline leaves. Basal leaves with petiole 3-8 cm, crisped glandular villous near base, elsewhere glandular pubescent; leaf blade reniform, 0.7-1.5 × 0.9-1.8 cm, margin generally 5-7-lobed; lobes broadly ovate, glandular pubescent. Proximal cauline leaves with petiole 0.3-3.4 cm, glandular pubescent; leaf blade reniform, 0.8-2 × 1-2.4 cm, glandular pubescent, margin 5-7(-9)-lobed; distal cauline leaves with petiole shorter, leaf blade 3-lobed at margin. Cyme 2-5-flowered or flower solitary; bulbils present in bract axils; pedicels 0.6-3 cm, glandular pubescent. Sepals erect, elliptic or ovate to suboblong, 3-3.7 × 1-2.8 mm, abaxially and marginally glandular pubescent, veins 3(-7), not, partly, or fully confluent at apex, apex subobtuse or acute. Petals white or yellowish, obovate to narrowly so, 4.5-10.5 × 2.1-4.1 mm, 3-8(-10)-veined, base gradually contracted into a claw 1.2-1.8 mm, apex retuse or obtuse. Stamens 4-5.5 mm. Ovary subsuperior, ovoid; styles 0.9-2 mm. Fl. and fr. Jun-Sep. 2n = 36, 48, 50, 52, 56, 60-70.
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Description

Herb, 4-13 cm high, sometimes branching. Basal leaves 8-10 x 4-10 mm, reniform with rounded to acute lobes; petiole c. 1.5 cm long. Cauline leaves lanceolate, with bulbils in their axils; bulbils red. Flowers white, terminal. Sepals 2-4 mm, ovate, subacute, pubescent. Petals c. 6 mm, oval-oblong, narrow at the base. Carpels almost free; style short.
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Diagnostic Description

Synonym

Lobaria cernua (Linnaeus) Haworth; Saxifraga cernua f. bulbillosa Engler & Irmscher; S. cernua var. linnaeana Seringe; S. cernua f. ramosa J. G. Gmelin; S. cernua f. simplicissima Ledebour.
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Ecology

Habitat

Forests, forest margins, alpine meadows, alpine rock crevices; 2200-5500 m.
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Life History and Behavior

Cyclicity

Flower/Fruit

Fl.Per.: July-September.
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Molecular Biology and Genetics

Molecular Biology

Barcode data: Saxifraga cernua

The following is a representative barcode sequence, the centroid of all available sequences for this species.


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Statistics of barcoding coverage: Saxifraga cernua

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 4
Specimens with Barcodes: 28
Species With Barcodes: 1
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Conservation

Conservation Status

National NatureServe Conservation Status

Canada

Rounded National Status Rank: NNR - Unranked

United States

Rounded National Status Rank: NNR - Unranked

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NatureServe Conservation Status

Rounded Global Status Rank: G5 - Secure

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Wikipedia

Saxifraga cernua

Saxifraga cernua, (drooping saxifrage, nodding saxifrage or bulblet saxifrage) is a flower common all over the High Arctic. It stretches further south in mountainous areas of the Alps, Norway, Iceland, Siberia and Alaska.

Saxifraga cernua

It grows to 10–20 cm tall, the stem having 3–7 leaves. The basal and lower stern leaves are kidney-shaped, 3–5 lobed on long petioles. The flowers are mostly single, terminal, petals white, much longer than the sepals. Reproduction by means of brownish-red bulbils in the axils of the upper stern leaves.

This plant grows in moist sandy and mossy places, on ledges and in snow beds.

See also[edit]


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Notes

Comments

Found here in the Karakorum range and Gilgit (O. Polunin 6227, Stewart, l.c.) on stony and pebbly slopes and in rock crevices at c. 4500 m.
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