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FOC | Family List | FOC Vol. 20-21 | Asteraceae

77. Syncalathium Lipschitz in Sočava, Akad. Sukacevu 75-letiju So Dnja Rozhd. 358. 1956.

合头菊属 he tou ju shu

Authors: Zhu Shi & Norbert Kilian

Herbs, annual or perennial, acaulescent and rosulate, or, exceptionally, caulescent with thick and hollow, densely leafy stem, sometimes from thin, vertical, subterranean shoot with scaly leaves. Rosette shoot inflated at apex to a flat, convex, hollow receptacle, carrying usually some to numerous, densely crowded sessile or subsessile capitula, often with a reduced, linear subtending leaf. Capitula with 3 or 5 florets. Involucre narrowly cylindric. Phyllaries in 1 row; outer phyllaries absent; inner phyllaries 3 or 5, ± lanceolate, subequal in length, connate in basal part, hardened at maturity. Receptacle naked. Florets yellow or pale to medium purplish. Achene obconical, compressed, with 5 ribs, apex truncate. Pappus of grayish white, with scabrid bristles, usually caducous.

● Five species: China.

The species formerly treated as Syncalathium souliei (incl. S. orbiculariforme) is not a congener and is not even part of subtribe Crepidinae; it is a member of subtribe Lactucinae and included in the genus Melanoseris (see M. souliei, p. 225).

1 Capitula with 5 florets; phyllaries 5; florets yellow   (2)
+ Capitula with 3 florets; phyllaries 3 or 4; florets purplish   (3)
2 (1) Leaf blade narrowly obovate to narrowly oblanceolate; florets with ligule ca. 3 mm.   1 S. disciforme
+ Leaf blade orbicular or ovate; florets with ligule 8-9 mm.   2 S. chrysocephalum
3 (1) Leaf blade 3-8 cm; florets very pale rose.   5 S. roseum
+ Leaf blade ≤ 3 cm; florets purple   (4)
4 (3) Involucre 1.1-1.3 cm; anthers 5-6 mm; pappus 10-12 mm.   3 S. porphyreum
+ Involucre 0.7-0.9 cm; anthers 2.5-4 mm; pappus 6-8 mm.   4 S. kawaguchii

Lower Taxa


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