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

1. Erigeron sect. Erigeron

飞蓬组 fei peng zu

Herbs, perennial, rarely biennial or subshrubs; rhizome short, erect; caudex simple or shortly branched; herbage strigose to hirsute or villous. Stems simple. Leaves mostly basal, oblanceolate to obovate or spatulate, base not clasping, margin entire. Capitula erect in bud, solitary. Ray florets white or blue, rarely yellow or orange, lamina strap-shaped, erect or spreading, coiling (rarely not coiling). Achenes 1.6-2.8 mm, 2-veined. Pappus 2-seriate, outer of short scales or setae, inner of (7-)10-30 bristles, rarely accrescent.

About 65 species: Asia, Europe, North and South America; 27 species (13 endemic) in China.


1 Ray floret lamina involute when dry   (2)
+ Ray floret lamina flat   (14)
       
2 (1) Disk floret limb cylindric or cylindric-funnelform, anthers and style branches not exserted from corolla   (3)
+ Disk floret corollas narrowly funnelform, anthers and style branches often exserted from disk corolla   (7)
       
3 (2) Disk floret limb cylindric-funnelform.   23 E. petiolaris
+ Disk floret limb cylindric and abruptly ampliate or narrowly cylindric   (4)
       
4 (3) Phyllaries exceeding or equaling disk florets, outer series slightly shorter than or equaling inner   (5)
+ Phyllaries longer than disk florets, outer series usually 1/2 as long as inner   (6)
       
5 (4) Phyllaries appressed, apex purple, densely villous (some with purple crosswalls).   24 E. eriocalyx
+ Phyllaries ± loose, green or purplish, densely yellowish villous at base.   25 E. lachnocephalus
       
6 (4) Stems sparsely hirsute; achenes ca. 0.3 mm wide, sparsely strigose.   26 E. lonchophyllus
+ Stems ± densely hirsute and strigillose; achenes ca. 0.6 mm wide, strigose.   27 E. oreades
       
7 (2) Capitula 0.8-1.5 cm in diam.; ray florets 5-7 mm; phyllaries shorter than to equaling or sometimes slightly exceeding disk florets   (8)
+ Capitula 1.5-3.2 cm in diam.; ray florets 6.5-13.7 mm; phyllaries exceeding or equaling disk florets   (10)
       
8 (7) Plants 15-50(-60) cm tall; mid and upper cauline leaves narrowly oblong, apex obtuse or rounded, surfaces eglandular.   20 E. himalajensis
+ Plants 5-25 cm tall; mid and upper cauline leaves linear or linear-lanceolate, apex acute or shortly acuminate, surfaces often stipitate glandular   (9)
       
9 (8) Stems green, 9-25 cm tall; phyllaries green, sparsely strigillose, densely short-stipitate glandular.   21 E. pseudotenuicaulis
+ Stems purple, 5-7 cm tall; phyllaries purple, sparsely hirsute-villous, strigillose, often stipitate glandular at base.   22 E. purpurascens
       
10 (7) Phyllaries sparsely to ± densely villous and shortly strigose, ± densely stipitate glandular, outer apex spreading, often squarrose; ray florets purple; lobes of disk florets hairy.   15 E. patentisquama
+ Phyllaries villous to glabrate, strigillose, eglandular, outer appressed; ray florets white or purplish; lobes of disk florets glabrous or hairy at base   (11)
       
11 (10) Cauline leaves 3-6, often crowded at base, upper gradually reduced; stems sparsely long villous, strigillose.   19 E. kunshanensis
+ Cauline leaves 5 to numerous, usually slightly reduced upward; stems densely villous, strigillose   (12)
       
12 (11) Ray florets white, sometimes pink tinged or purplish; phyllaries green, sometimes purple, sparsely to ± densely villous, shortly scabrous; lobes of disk florets glabrous or hairy at base.   16 E. multifolius
+ Ray florets purple; phyllaries ± purple, lanate (crosswalls pale yellow or purple); lobes of disk florets glabrous or hairy   (13)
       
13 (12) Upper cauline leaves and phyllaries lanate (crosswalls yellow or purple); cauline leaves oblanceolate or oblong-oblanceolate to oblong; lobes of disk florets glabrous.   17 E. porphyrolepis
+ Upper cauline leaves and phyllaries villous to lanate (crosswalls purple); cauline leaves elliptic-ovate; lobes of disk florets hairy.   18 E. lanuginosus
       
14 (1) Phyllaries distinctly exceeding disk florets; ray florets lilac to lavender or purple, or sometimes white; disk floret lobes yellow   (15)
+ Phyllaries shorter than to equaling or slightly longer than disk florets; ray florets blue, purple, lilac, reddish, white, or rarely orange; disk floret lobes yellow or purplish to purple   (18)
       
15 (14) Capitula 1.2-2.5 cm in diam   (16)
+ Capitula 2.5-4 cm in diam   (17)
       
16 (15) Lower and mid cauline leaf margins entire.   12 E. latifolius
+ Lower and mid cauline leaf margins 3-6-serrate to coarsely serrate above middle.   14 E. kiukiangensis
       
17 (15) Phyllaries hirsute, densely stipitate glandular apically only; capitula 3-4 cm in diam.   11 E. multiradiatus
+ Phyllaries densely stipitate glandular, basally hirsute; capitula 2.5-3 cm in diam.   13 E. leucoglossus
       
18 (14) Leaves mostly basal.   10 E. breviscapus
+ Leaves basal and cauline   (19)
       
19 (18) Ray florets orange, sometimes yellow to brick-red.   5 E. aurantiacus
+ Ray florets pale purple, blue, lilac, or rarely white   (20)
       
20 (19) Capitula 1-2.5 cm in diam   (21)
+ Capitula to 4 cm in diam   (23)
       
21 (20) Phyllaries dark cork-colored, shorter than or almost equaling disk florets, hirsute-villous and stipitate glandular; disk floret lobes yellow.   1 E. leioreades
+ Phyllaries green or purple to partly purple, longer than or equaling disk florets, villous or scabridulous, eglandular or sparsely glandular; disk floret lobes purplish   (22)
       
22 (21) Plants 5-20(-30) cm tall; basal leaf surfaces glabrate; phyllaries ± densely scabridulous; ray florets 6-7 mm, disk florets 3.8-4.2 mm; inner pappus bristles 3-3.5 mm.   8 E. morrisonensis
+ Plants 20-35 cm tall; basal leaf surfaces sparsely villous-strigose, strigillose; phyllaries ± densely villous; ray florets 7-8.5 mm, disk florets 5-5.1 mm; inner pappus bristles 5-6 mm.   9 E. taipeiensis
       
23 (20) Ray florets blue.   4 E. vicarius
+ Ray florets lilac to pale purple, rarely white   (24)
       
24 (23) Disk floret lobes purplish.   7 E. alpicola
+ Disk floret lobes yellow   (25)
       
25 (24) Phyllaries densely villous to lanate, eglandular.   6 E. allochrous
+ Phyllaries villous or strigose and stipitate glandular   (26)
       
26 (25) Ray florets 6.5-8(-13) mm; phyllaries hirsute-villous and margin stipitate glandular.   2 E. seravschanicus
+ Ray florets 10-12 mm; phyllaries densely stipitate glandular, sparsely strigose (or not).   3 E. altaicus

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