Melanoseris jilongensis

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Melanoseris jilongensis

https://pictures.bgbm.org/digilib/Scaler/IIIF/Cichorieae!Melanoseris_jilongensis_Bc_02.jpg/full/full/0/default.jpg

Systematics

Melanoseris jilongensis resembles M. macrorhiza but can be distinguished from the latter by the basal leaves, which are ovate-cordate to elliptic (instead of oblong to spatulate) with a coarsely dentate (instead of entire) margin, (0–)1–2 (instead of 2–4(–6)) pairs of lateral lobes, and both faces sparsely covered with coarse short hairs (instead of usually glabrous, more rarely rachis ± hispid with purplish brown hairs), the stem indumentum (pilose (vs. glabrous) and the achenes, which are broadly ellipsoid (instead of narrowly fusiform), conspicuously pilose (instead of glabrous), with the lateral ribs obviously (instead of weakly) broadened and the apex attenuate into an 1 mm (instead of 1–3 mm) long beak.

The phylogenetic tree based on the nrITS sequences resolved Melanoseris jilongensis as a member of the M. atropurpurea-M. graciliflora clade, whereas it is found nested in the M. cyanea clade in the plastid DNA tree (Yin & al. 2018).A

Description

"Perennial herbs, with taproot, 25–70 cm tall. Stems solitary or few, slender, ascending-erect, branched from base or higher up, sparsely pilose, leafy. Basal leaves ovate-cordate to elliptic, still present at anthesis, (4–)10–20 × (2–)3–11 cm, undivided or usually lyrately pinnatifid to lyrately pinnatisect, margin coarsely dentate; lateral lobes (0–)1–2 pairs, orbicular to elliptic, apex obtuse to rounded; terminal lobe largest, ovate-cordate, triangular-ovate, or elliptic, apex rounded to acute; petiole long and slender, ± winged in distal portion, 6–18(–29) cm. Stem leaves 2–4; lower and middle stem leaves similar to basal leaves but smaller, with petiole much shorter, all ± obviously winged, basally expanded and auriculate; uppermost leaves sessile, lanceolate to narrowly elliptic, undivided or sometimes shallowly pinnatifid; both sides of leaves sparsely covered with rough hairs. Synflorescence loosely to paniculately corymbiform, with slender branches and usually 4–10 capitula. Capitula with usually 8–12(–15) florets; peduncles covered with brownish arachnoid or short coarse hairs. Involucre cylindric to narrowly campanulate. Phyllaries in 3–5 series, 1–1.3 × 0.4–0.6 cm, light to reddish green, glabrous or ± with hispid hairs; outer phyllaries triangular-ovate to lanceolate, longest ca. 1/2 as long as inner ones; inner phyllaries 8. Florets purplish blue; length of anthers without appendages ca. 4.3 mm. Achenes ca. 5 mm; body dark brown, elliptic, subcompressed, strongly pilose, lateral ribs obviously broadened, apex attenuate into 1 mm white stout beak. Pappus white, with an outer row of minute hairs of 0.1–0.2 mm, and bristles of ca. 7 mm."

from Yin & al. (2018: 194).A

Distribution

Asia-Temperate: TibetnativeA

Credits

Wang Zehuan 2018: Images (2 added).
Zhang Jianwen 2018: Images (2 added).

Bibliography

A. Yin Z.-J. & al., A new species of Melanoseris (Lactucinae, Cichorieae, Asteraceae) from SW Xizang, China, based on morphological and molecular data in Phytotaxa 357: 189-197. 2018