BRUNIACEAE R. Br. ex DC.

Key to the tribes, genera, and subgenera (see Figs. 2–4)

1. Anthers apically ending in a conspicuous sterile tip (Linconieae) .......................................... 1. Linconia

1. Anther apex without a sterile tip .......................... 2

2. Thecae connate along their entire length; anthers not versatile; stomata often surrounded by cuticular rim (Audouinieae) ................................................... 3

2. Thecae free at their base; anthers versatile; stomata never surrounded by cuticular rim ( Brunieae) .................. 4

3. Flowers arranged in spike-like clusters, each flower on a bracteate short-shoot; flower pedicels present; stomata surrounded by cuticular rim ................. 2. Audouinia

3. Flowers solitary, each on a leafy shoot or bracteate short shoot (only in Thamnea tere s); flowerpedicelsabsent (except T.hirtella); stomata rarelysurrounded by cuticular rim (only in T. teres)................................ 3. Thamnea

4. Styles 2, united; inflorescences with basipetal flowering sequence ........................................... 4. Staavia

4. Styles 1 or 2, free; flowering sequence not as above .... 5

5. Pollen 3-colporate; stamens exserted; inflorescences laterally arranged ..................................... 5. Berzelia

5. Pollen 5- to 10-colporate; stamensshorterthancorolla (except Brunia subg. Brunia); terminal inflorescence usually present ....................... 6. Brunia → 6 for subgenera

6. Stamens exserted; petals with 2 narrowly associated ridges .................................. 6.1 B. subg. Brunia

6. Stamens included; petals different from above .......... 7

7. Petalbulgesformingathickcushionwithverticalsubdivision; petals free, less than 5 mm long..................... 8

7. Petal bulges reduced or absent; petals postgenitally fused with filaments, more than 5 mm long ..................... ................................... 6.5 B. subg. Lonchostoma

8. Leaves erect-spreading...... 6.2 B. subg. Pseudobaeckea

8. Leaves appressed to partly imbricate ..................... 9

9. Inflorescences usually larger than 5 mm in diameter; leaves hairy (except B. angulata, B.microphylla) ......... ........................................ 6.3 B. subg. Raspalia

9. Inflorescences usually 2–4 mm in diameter or flowers solitary ( B. bullata, B. callunoides); leaves glabrous ..... .................................. 6.4 B. subg. Mniothamnea