— 2 — 



taken therefore, by the first-named author, from the nature of the matter is 

 more or less, a supplement the corresponding part of his dissertation (in 

 the following cited as „Verb.") 



For the sake of completeness the revision contains all the species 

 which occur in the regions cited, together with their synonymy and the 

 keys for determination. 



About our opinion in the matter of varieties, see Verb. 2. 



Key of the genera (auctore H. J. L.) 



1. a. Fertile stamens 2 . . , 2 



b. Fertile stamens 4 . . . , 3 



c. Fertile stamens 5 or more 26 



2. a. Leaves simple; undershrubs 4. Stachytarpheta. 



b. Leaves pinnately composed, with winged rhachis; trees 20. Peronema. 



3. a. Inflorescence capitate, spicate or racemose 4 



b. Inflorescence cymose or flowers axillary in the axils of leaves . . .11 



4. a. Inflorescence racemose, axillary; climbing shrubs or trees. 6. Petraea. 



b. Inflorescence spicate; erect shrubs or undershrubs , . . , „ . .5 



c. Inflorescence capitate; trees or climbing shrubs .10 



5 a. Fruits drupaceous, with fleshy exocarp . . , .6 



b. Fruits capsular, with leathery or dry exocarp 7 



6 a. Inflorescenses elongated. Drupes with 4 or by abortion 2 pyrenes; pyrenes 



2-celled, 2 seeded 7. Duranta. 



b. Spikes short-spicate. Drupes one 2-seeded or two 1-seeded pyrenes 2. Lantana. 



7 a. Ovules apically attached. Fruits bivalvate, by abortion 1-seeded 25. Avicennia. 



b. Ovules basal. Fruits more-seeded, splitting in 2-4 pyrenes 8 



8 a. Fruits with four 1-seeded cells or pyrenes (cocci) . . .1. Verbena. 



b. Fruits with 2 (or by abortion 1) pyrenes 9 



9 a. Pyrenes 2-celled, 2-seeded ..... ... 5. Priva. 



b. Pyrenes 1-celled, 1-seeded 4. Stachytarpheta. 



10 a. Heads with 3-4 involucral bracts; climbing shrubs . . 23. Congea. 

 b. Heads without involucral bracts; trees in the mangrove-formation 



25. Avicennia. 



11 a. Inflorescences terminal, often composed, the small inflorescences beeing 



sometimes attached at rather large intervals « 12 



b. Inflorescences axillary, simple, or flowers solitary in the axils of the leaves 21 



12 a. Flowers small. 0.5-1 c.M. long; corolla-tube short, relatively rather broad, 



cylindrical or nearly so . . . ... . . . . .13 



b. Flowers larger, 1.5-12 c.M. long; corolla-tube long, relatively rather narrow, 

 at least at the base, cylindrical or infundibuliform and widened near the throat 19 



13 a. Leaves composed . . . . .14 



b. Leaves simple 17 



14 a. Calyx not enlarged in fruit 15 



b. Calyx with enlarged, membranous lobes in fruit . 21. Petraeovitex. 



15 a. Corolla 4-merous 13. Viticipremna 



b. Corolla 5-merous , ... 16 



16 a. Fruit capsular, indéhiscent, 1-celled, 1-seeded, large; petioles more or less 



winged, at least when young .... 10. Teysmanniodendron. 

 b. Fruit drupaceous with one 4-celled pyrene, small . . .14. Vitex. 



1 7 a. Corolla 4-merous 12. Premna. 



b. Corolla 5-merous 18 



18 a. Calyx unaltered in fruit 14. Vitex. 



b. Calyx with enlarged, membranous lobes in fruit. Petraeovitex bambusetorum. 



