Rock Stitchwort (Sabulina dawsonensis)
Description
Plants perennial, sometimes mat-forming, green. Taproots filiform to somewhat thickened. Stems erect to ascending, green, 4-30 cm, glabrous, internodes of flowering stems 1-10 times as long as leaves. Leaves overlapping or crowded proximally, variably spaced distally, connate proximally, with tight, scarious to herbaceous sheath 0.2-0.5 mm; blade straight to slightly outwardly curved, green, flat, 1-veined, occasionally 3-veined abaxially, linear to subulate, 4-15 - 0.5-2 mm, flexuous, margins not thickened, scarious, smooth, apex green or purple, mostly rounded, slightly navicular, shiny, glabrous; axillary leaves present among proximal cauline leaves. Inflorescences 7-15-flowered (rarely fewer), open cymes; bracts subulate, herbaceous. Pedicels 0.3-2.5 cm, glabrous. Flowers: hypanthium disc-shaped; sepals prominently 3-veined, ovate to broadly lanceolate (herbaceous portion ovate to broadly lanceolate), 2.5-3.2 mm, to 4 mm in fruit, apex green to purple, acute to apiculate, not hooded, glabrous; petals lancolate to spatulate, 0.5-0.8 times as long as sepals, apex rounded, entire, or petals absent. Capsules on stipe ca. 0.2 mm, ovoid, 3.5-4.5 mm, longer than sepals. Seeds dark brown to black, suborbiculate with radicle prolonged into tiny beak, 0.5-0.6 mm, tuberculate; tubercles low, rounded, somewhat elongate. 2N = 30, 60.
Taxonomic tree
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Domain: Eukarya
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Kingdom: Plantae
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Phylum: Magnoliophyta
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Class: Magnoliopsida
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Order: Caryophyllales
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Family: Caryophyllaceae
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Genus: Sabulina
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