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

64. Chondrilla Linnaeus, Sp. Pl. 2: 796. 1753.

粉苞菊属 fen bao ju shu

Authors: Zhu Shi & Norbert Kilian

Herbs, perennial [or rarely annual], with or without basal leaf rosette, often broomlike, glabrous or with simple bristles, arachnoid hairy, or tomentose. Synflorescence of individual axes in broomlike plants sparsely racemiform or with a single terminal capitulum. Capitula with usually 5-12 florets. Involucre narrowly cylindric. Phyllaries glabrous, arachnoid hairy, or with simple bristles; outer phyllaries few, only slightly longer centripetally, longest ca. 1/4 as long as inner ones; inner phyllaries 5(-7) or ca. 8, ± equal in length, ± linear-lanceolate. Receptacle naked. Florets yellow. Achene body subcylindric, somewhat narrowed toward base, with 5 main ribs, each rib usually divided into 3 secondary ribs, apically or from middle with tubercles or scales, apically usually with a corona of 5 entire or 3-lobed ± membranous scales; beak usually present, short and stout to longer and filiform, when fully mature with or without fine transversal articulation preforming rupture of beak. Pappus white, simple, of scabrid bristles.

About 30 species: mostly in C and SW Asia and the Mediterranean region; ten species in China.

The noxious weed Chondrilla juncea Linnaeus has been introduced to Australia, North and South America, and Pacific islands (New Zealand) but has not yet been reported from China.

1 Capitula with 5 or 6 florets; inner phyllaries 5(-7)   (2)
+ Capitula with 9-12 florets; inner phyllaries ca. 8   (3)
2 (1) Achene with a conspicuous 0.5-1.5 mm beak, body with well-developed apical corona of scales.   9 C. pauciflora
+ Achene shortly attenuate into a rudimentary stout beak of 0.1-0.3 mm, body without apical corona of scales or corona at most very indistinct.   10 C. ambigua
3 (1) Beak of mature achene without fine transversal articulation preforming rupture of beak; plants rosulate but rosette leaves withered at anthesis   (4)
+ Beak of mature achene with fine transversal articulation preforming rupture of beak; plants never rosulate   (5)
4 (3) Stem leaves linear-lanceolate to linear, to 0.6 cm wide, subglabrous; stem and branches glabrous; achene body with corona of 5 variably shaped entire to weakly 3-lobed scales to 0.5 mm.   1 C. brevirostris
+ Stem leaves lanceolate to broadly ovate, 1-3 cm wide, pubescent; stem and branches arachnoid pubescent to tomentose; achene body with corona of 5 linear-lanceolate, entire to sometimes 3-lobed, and acute scales to 1 mm.   2 C. aspera
5 (3) Achene beak articulation approximately in its middle; inner phyllaries dark green or blackish, bristles blackish if present   (6)
+ Achene beak articulation distinctly below its middle, near its base, or below or slightly above upper edge of corona; inner phyllaries green, light green, or grayish green, bristles pale if present   (7)
6 (5) Achene body below corona smooth or with isolated tubercles, beak constricted at articulation.   3 C. phaeocephala
+ Achene body below corona with few scales, beak not constricted at articulation.   4 C. ornata
7 (5) Corona scales of achene of approximately quadrangular shape, upper margin weakly 3-lobed or entire   (8)
+ Corona scales of achene distinctly triangular and undivided or deeply divided with distinctly triangular lobes   (9)
8 (7) Achene body below corona usually without scales or more rarely with few very small toothlike scales, beak 0.8-1.5 mm.   5 C. piptocoma
+ Achene body below corona with few rows of conspicuous quadrangular scales similar to corona scales, beak 1-2.5 mm.   6 C. laticoronata
9 (7) Corona scales of achene deeply and ± equally to very unequally (with dominating middle lobe) 3-lobed; achene body below corona with few rows of tubercles and narrow scales; beak 1.3-3(-4) mm, articulation below its middle and above upper edge of corona terminating basal conical portion.   7 C. leiosperma
+ Corona scales of achene undivided and narrowly triangular; achene body below corona with few rows of short and wide scales; beak 1.2-2.3 mm, articulation at its base near upper edge of corona.   8 C. rouillieri

Lower Taxa


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