Lavoisiereae De Candolle (1828: 100)

Subshrub or shrub, erect. Branch dichotomous and/or trichotomous. Branch, leaf, hypanthium, and sepal glandular, glandular-punctate, hirsute, setose, velutinous, villous, or sometimes glabrous. Leaf sessile or petiolate, imbricate or not, patent or ascending. Inflorescence in dichasia, glomerulous or reduced to one bracteolate flower, (4–)5–6-merous, sessile or pedicellate; hypanthium sometimes with a bristled crown at the apex; petal entirely cream, magenta, purplish, yellow, pink or pink with cream or white base, or cream with pink stains at the apex; stamens (8–)10–12, dimorphic or subisomorphic, bicolorous or concolorous; anther tetrasporangiate or polysporangiate; pedoconnective prolonged with a ventral appendage; ovary 3–5(–6)-locular, superior, inferior or partly inferior. Capsule dehiscing from the base to the apex, or from the apex to the base, columella deciduous or persistent.

Key to the species of Lavoisiereae

1. Haplostemonous androecium, staminodia present .............................................................................................................................2

- Diplostemonous androecium, staminodia absent ...............................................................................................................................3

2. Five subisomorphic stamens.................................................................................................................. 25. Rhynhanthera dichotoma

- Five dimorphic stamens, with one strikingly longer than the other four............................................26. Rhynchanthera grandiflora

3. Capsule dehiscent from the base to the apex......................................................................................................................................4

- Capsule dehiscent from the apex to the base......................................................................................................................................5

4. Leaf blade 1-nerved; hypanthium glabrous or sparsely setose at the apex; sepal triangular; stamens bicolorous with large (antesepalous) anther reddish .........................................................................................................................15. Microlicia minensis

- Leaf blade 3-nerved; hypanthium glandular in the middle region; sepal oblong; stamens bicolorous with large (antesepalous) anther yellow ............................................................................................................................................... 4. Microlicia cataphracta

5. Ovary 3–4-locular...............................................................................................................................................................................6

- Ovary 5-locular.................................................................................................................................................................................24

6. Hypanthium with a bristled crown at the apex...................................................................................................................................7

- Hypanthium without a bristled crown at the apex..............................................................................................................................8

7. Branch node, leaf blade, and hypanthium glabrous ........................................................................................... 1. Microlicia armata

- Branch node, leaf blade, and hypanthium setose ............................................................................................7. Microlicia fastigiata

8. Petal yellow ............................................................................................................................................................8. Microlicia flava

- Petal pink, purplish, magenta, or cream .............................................................................................................................................9

9. Leaf blade with callose margin...................................................................................................................... 24. Microlicia viminalis

- Leaf blade without callose margin....................................................................................................................................................10

10. Inflorescence in glomerules, dichasia, or reduced to one bracteolate flower...................................................................................11

- Flower always solitary......................................................................................................................................................................13

11. Leaf blade slightly cordate at the base; petal with glandular-ciliate margin .....................................................3. Microlicia capitata

- Leaf blade rounded at the base; petal with glabrous margin ............................................................................................................12

12. Hypanthium cylindrical with linear-subulate sepal; mature capsule with apex not exceeding the hypanthium torus......................... ..................................................................................................................................................................... 16. Microlicia nakajimae

- Hypanthium campanulate with triangular or oblong sepal; mature capsule with apex exceeding the hypanthium torus ................... ...................................................................................................................................................................... 12. Microlicia inquinans

13. Anther polysporangiate ....................................................................................................................................................................14

- Anther tetrasporangiate ....................................................................................................................................................................16

14. Stamens bicolorous............................................................................................................................................10. Microlicia hirsuta

- Stamens concolorous ........................................................................................................................................................................15

15. Leaf blade 1-nerved...................................................................................................................................19. Microlicia polystemma

- Leaf blade 3–5-nerved............................................................................................................................. 6. Microlicia euphorbioides

16. Leaf blade only glandular-punctate ..................................................................................................................................................17

- Leaf blade glandular, glandular-punctate, and hirsute-villous, setose, or velutinous.......................................................................19

17. Leaf petiolate, petiole 0.4–0.6 mm long........................................................................................................ 14. Microlicia martiana

- Leaf sessile .......................................................................................................................................................................................18

18. Leaf blade with the same internode length.................................................................................................... 13. Microlicia isophylla

- Leaf blade longer than the internode length ........................................................................................ 20. Microlicia sanfranciscana

19. Petal cream with pink stains at the apex; stamens concolorous with yellow anther ....................................... 9. Microlicia furnensis

- Petal purplish, magenta, or pink; stamens bicolorous with vinaceous and yellow anther ...............................................................20

20. Leaf blade discolorous, adaxial surface darker ...................................................................................23. Microlicia trembleyiformis

- Leaf blade concolorous.....................................................................................................................................................................21

21. Leaf blade cordate at the base ............................................................................................................................5. Microlicia cordata

- Leaf blade rounded or attenuate at the base .....................................................................................................................................22

22. Leaf blade with sparse glandular and glandular-punctate indumentum ............................................................................................... .................................................................................................................................................................... 2. Microlicia canastrensis

- Leaf blade with dense glandular-punctate and velutinous or hirsute indumentum ..........................................................................23

23. Leaf blade velutinous and glandular-punctate...........................................................................................21. Microlicia serpyllifolia

- Leaf blade hirsute and glandular-punctate.....................................................................................................11. Microlicia hirticalyx

24. Leaf blade discolorous, adaxial surface darker ............................................................................................17. Microlicia parviflora

- Leaf blade concolorous.....................................................................................................................................................................25

25. Leaf blade 3.5–6 × 1–2.5 mm, both surfaces glandular; petal 7–9.5 × 3–7 mm, purplish or white, acute, or acuminate at the apex ......................................................................................................................................................... 18. Microlicia phlogiformis

- Leaf blade 10–20 × 3–5 mm, both surfaces glandular-punctate; petal 10.5–12.5 × 6.5–7.5 mm, pink, truncate at the apex.............. ........................................................................................................................................................................ 22. Microlicia speciosa