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

Hyaloseris

 

Capitula containing actinomorphic, bilabiate, or pseudoligulate florets, or mixtures there of

2

2. (1)

Receptacles entirely (or partially) paleaceous

Jungia

 

Receptacles epaleaceous

3

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

4. (3)

Inflorescences of glomerules or synflorescences

Polyachyrus

 

Inflorescences of cymes, corymbs, panicles or of solitary capitula

5

5. (4)

Pappus of caducous scales

Nassauvia

 

Pappus setae capillary or broadened at base

6

6. (5)

Receptacles always glabrous;

7

 

Receptacles usually pubescent (of hairs or papillae)

8

7. (6)

Pappus setae usually uniseriate, flattened and broadened at base, barbellate or plumose; phyllaries biseriate; corollas white, pink, lilac or purple

Leucheria

 

Pappus setae biseriate, capillary, barbellate; phyllaries 1-2-seriate; corollas white

Holocheilus

8. (6)

Stems with spines terminating branches or axes of inflorescences

Proustia

 

Stems and inflorescence axes completely unarmed

9

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

Perezia

 

Subshrubs, shrubs (sometimes scandent or trailing) or small trees, or if herbaceous inflorescences corymbose and stem winged or with decurrent based leaves

10

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

Trixis

 

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

Lophopappus

11. (3)

Florets all actinomorphic

12

 

Florets clearly bilabiate, pseudobilabiate, pseudoligulate, capitula sometimes heterogamous and radiate

14

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

13. (12)

Plants soon appearing leafless (leafy only on young shoots); stems terminating in spine

Cyclolepis

 

Plants conspicuously leafy; stems unarmed

Gochnatia

14. (11)

Plants appearing leafless, minute linear-spathulate leaves falling rapidly

Aphyllocladus

 

Plants conspicuously leafy, stems leafy throughout or with apical or basal rosettes of leaves

15

15. (14)

Plants dioecious

Lycoseris

 

Plants monoecious

16

16. (15)

Leaves with simple or branched tendrils at apices, leaves often pinnate, sometimes simple

Mutisia

 

Leaves lacking tendrils at apices

17

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)

18. (17)

Marginal (ray) floret and disc floret corollas all bilabiate

19

 

Marginal (ray) floret bilabiate and disc floret corollas actinomorphic

22

19. (18)

Pappus setae plumose; erect, ascending or clambering subshrubs or shrubs; leaves usually herbaceous

Mutisia (sect. Holophyllum, sect. Fruticosa)

 

Pappus setae barbellate

20

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

Chaetanthera

 

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

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

Trichocline

 

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

Chaptalia

22. (18)

Corollas intense orange to orange-red; phyllaries with scarious apical appendages or apices linear to linear-lanceolate

Cnicothamnus

 

Corollas white, yellow, pink, reddish or purple, but never orange or orange-red; phyllaries lacking apical appendages

23

23. (22)

Florets few (5-6); leaf pubescence of malpighiaceous hairs; leaves linear lanceolate to oblong-lanceolate

Hyalis

 

Florets numerous (>10); leaf pubescence absent or of simple hairs; leaves rotund, ovate, hastate or lyrate

24

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

Onoseris

 

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

Plazia