Key to the genera of the Mutisieae
1. |
All capitula ligulate, or rarely with mixtures of ligulate and bilabiate florets in one capitulum as well as ligulate capitula on one plant |
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Capitula containing actinomorphic, bilabiate, or pseudoligulate florets, or mixtures there of |
2 |
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2. (1) |
Receptacles entirely (or partially) paleaceous |
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Receptacles epaleaceous |
3 |
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3. (2) |
Style arms truncate or rarely rounded; style hairs obtuse to rounded (subtribe Nassauviineae p.p.) |
4 |
Style arms apices acute or obtuse; style hairs mostly acute |
11 |
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4. (3) |
Inflorescences of glomerules or synflorescences |
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Inflorescences of cymes, corymbs, panicles or of solitary capitula |
5 |
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5. (4) |
Pappus of caducous scales |
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Pappus setae capillary or broadened at base |
6 |
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6. (5) |
Receptacles always glabrous; |
7 |
Receptacles usually pubescent (of hairs or papillae) |
8 |
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7. (6) |
Pappus setae usually uniseriate, flattened and broadened at base, barbellate or plumose; phyllaries biseriate; corollas white, pink, lilac or purple |
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Pappus setae biseriate, capillary, barbellate; phyllaries 1-2-seriate; corollas white |
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8. (6) |
Stems with spines terminating branches or axes of inflorescences |
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Stems and inflorescence axes completely unarmed |
9 |
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9. (8) |
Rosettiform sometimes caespitose herbs, rarely tall and leafy; inflorescences solitary and sessile in leaf rosette, scapiform with solitary or few capitula or of few headed panicles |
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Subshrubs, shrubs (sometimes scandent or trailing) or small trees, or if herbaceous inflorescences corymbose and stem winged or with decurrent based leaves |
10 |
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10. (9) |
Inflorescences usually of terminal cymes, corymbs or panicles, sometimes pseudoglomerules; style arms >1 mm long, apices truncate; receptacle pilose or densely long-pubescent; corollas yellow, orange or rarely white, variously pubescent or sometimes glabrous; pappus setae 2-3 (-4) -seriate |
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Inflorescence of terminal solitary or tightly grouped clusters of small capitula; style arms <1 mm long, apices rounded; receptacle papillate; corollas white or yellowish white, glabrous; pappus setae uniseriate |
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11. (3) |
Florets all actinomorphic |
12 |
Florets clearly bilabiate, pseudobilabiate, pseudoligulate, capitula sometimes heterogamous and radiate |
14 |
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12. (11) |
Plants dioecious; corollas whitish or cream; style shaft glabrous; inflorescences of many-headed usually leafy panicles or corymbs, capitula sessile or short-pedicellate |
Gochnatia (sect. Moquiniastrum) |
Plants monoecious |
13 |
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13. (12) |
Plants soon appearing leafless (leafy only on young shoots); stems terminating in spine |
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Plants conspicuously leafy; stems unarmed |
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14. (11) |
Plants appearing leafless, minute linear-spathulate leaves falling rapidly |
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Plants conspicuously leafy, stems leafy throughout or with apical or basal rosettes of leaves |
15 |
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15. (14) |
Plants dioecious |
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Plants monoecious |
16 |
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16. (15) |
Leaves with simple or branched tendrils at apices, leaves often pinnate, sometimes simple |
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Leaves lacking tendrils at apices |
17 |
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17. (16) |
Capitula radiate and marginal (ray) florets with conspicuous ray limb, either with marginal floret corollas bilabiate and disc florets corollas actinomorphic or marginal and disc florets corollas bilabiate |
18 |
Capitula discoid and all florets corollas bilabiate and hermaphrodite |
Mutisia (sect. Isantha) |
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18. (17) |
Marginal (ray) floret and disc floret corollas all bilabiate |
19 |
Marginal (ray) floret bilabiate and disc floret corollas actinomorphic |
22 |
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19. (18) |
Pappus setae plumose; erect, ascending or clambering subshrubs or shrubs; leaves usually herbaceous |
Mutisia (sect. Holophyllum, sect. Fruticosa) |
Pappus setae barbellate |
20 |
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20. (19) |
Leafy stemmed erect or prostrate annual or perennial herbs or dense caespitose or lax subshrubs or shrubs; inflorescences of solitary sessile or subsessile terminal capitula or a short few-headed cyme; ray florets female and lacking staminodes, neuter or hermaphrodite; outer phyllaries often foliaceous |
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Acaulescent rosulate scapiform herbs; scapes usually very long and with few to several scale-like bracteoles, scapes often markedly elongating in fruit; ray florets usually with staminodes; outer phyllaries never foliaceous (subtribe Gerberinae) |
21 |
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21. (20) |
Plants with stout rhizomes; involucres mostly broad and hemispherical; achenes short and ovoid; anther filaments papillate; achene setulae flattened and spathulate; ray limbs pubescent and sometimes glandular-punctate; pappus setae multiseriate, free at base, barbellate; corollas yellow to orangeish yellow or rarely reddish; capitula always erect |
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Plants usually with slender rhizomes and often wiry or fibrous roots; involucres mostly turbinate; achenes usually long, cylindrical, sometimes beaked; anther filaments glabrous; achene setulae inflated or of short or very long twin hairs or absent; ray limbs usually glabrous; pappus setae usually uniseriate and often united at base, setae fine; corollas usually white, rarely purplish; capitula either nodding or erect in bud and flower becoming erect in fruit |
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22. (18) |
Corollas intense orange to orange-red; phyllaries with scarious apical appendages or apices linear to linear-lanceolate |
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Corollas white, yellow, pink, reddish or purple, but never orange or orange-red; phyllaries lacking apical appendages |
23 |
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23. (22) |
Florets few (5-6); leaf pubescence of malpighiaceous hairs; leaves linear lanceolate to oblong-lanceolate |
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Florets numerous (>10); leaf pubescence absent or of simple hairs; leaves rotund, ovate, hastate or lyrate |
24 |
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24. (23) |
Ray or marginal floret corollas pink, purple or violet; capitula solitary or few in corymbs but never surrounded by apical leaves; achenes glabrous or densely setuliferous; plants eglandular; annual or perennial herbs, subshrubs or suffruteces |
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Ray or marginal corollas white; inflorescences solitary, terminal and sessile and surrounded by apical leaves; achenes glabrous or glandular-punctate; stems resinous and short-pubescent, leaves sticky and glabrous above and densely pubescent beneath; resinous shrubs |
