— 3 — 



19 a. Calyx closed at first, 2-3- lobed afterwards ... 16. Faradaya. 



b. Calyx 3-5- nierons from the beginning 20 



20 a. Corolla-tnbe relatively long, cylindrical; stamens indistinctly didynamons, 



usually long exserted; fruit drupaceous with 4 pyrenes 18. Clerodendron 

 b. Corolla-tube funnel-shaped, very wide across the throat; stamens very 

 distinctly didynamons, little exserted or included; fruit drupaceous with 

 one 1-4- celled pyrene 15. Gmelina. 



21 a. Inflorescences axillary 22 



b. Flowers solitary in the axils of the leaves . . Gmelina uniflora. 



22 a. Calyx 2-3- lobed when adult, large 23 



b. Calyx small, regularly 4-5- toothed 8. Callicarpa. 



c. Calyx indistinctly 5- lobed or undulate, nearly circular, spreading, coloured 

 19. Holmskjoeldia 



d. Calyx regularly or irregularly 5- toothed 24 



23 a. Corolla-lobes subequal; pyrenes 3-4 16. Faradaya. 



b. Corolla-lobes unequal, 3 obovate, 1. linear; pyrenes 1-2 . . 17. Hosea. 



24 a. Calyx unaltered in fruit 25 



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



25 a. Corolla-tube short, 0.3-1 cM.; limb 2- lipped .... 14. Vitex. 

 b. Corolla-tube longer, cylindrical, Glender, 0.5-12 cM.; limb often subregularly 



5- lobed 18. Clerodendron. 



26 a. Inflorescences capitate, with involucral bracts 27 



b. Inflorescences cymose or spicately racemose 28 



27 a. Flowers 5- merous 23. Sphenodesme. 



b. Flowers 6-18- merous 22. Sijmphorema. 



28 a. Inflorescences terminal, composed 29 



b. Inflorescences axillary, simple 8. Callicarpa. 



29. a. Inflorescences cymose, panicled . , 9 Tectona. 



b. Inflorescences racemose, subspicate, brachiate near the base. 11 Xerocarpa. 



1. VERBENA L. (auctore H. J. L.). 

 Syst. Veg. ed. I (1737); Verb. 9. 



Distribution: chiefly in tropical America, very few species in the 

 old world, one cosmopolitica! for tropical and temporate regions. 



a. Corolla blue, 0.6 c.M.; leaves oblong-lanceolate, 5-10 c.M. . 1. V. officinalis. 



b. Corolla red-violed, 0.35 c.M.; leaves narrowly lanceolate, 7'/2 - 1 3'/ 2 by 



0. 8.3 c.M 2. V. bonariensis. 



1. Verbena officinalis L. Sp. PI. 29 (1753); Verb. 10. 

 Distribution: Cosmopolitica! for tropics and subtropics. 



2. Verbena bonariensis i. Sp. Pl. 2S (1753); SCHAUER, DC, Prodr. 

 XI, 541; ID in MARTIUS, FI. Bras. IX, 189— A herb, 7 2 --27 2 M. high; branch- 

 lets acutely quadrangular, sparsely pubescent, as is inflorescence, the ribs 

 more densely pubescent; leaves sessile, opposite, in one pair together 

 amplexicaulous, the pairs decussate; lanceolate, apex acuminate, margins 

 irregularly serrate, the serrulations often sublanceolate ; both surfaces, 

 especially the upper one hirsutely hairy; nerves indistinct, in about 5 pairs ; 

 7l /2--13'/, by 0.8-3 c.M.; inflorescences spicate, the spikes on long and 

 slender, opposite peduncles, forming together a lax terminal panicle ; spikes 

 cylindrical, 1-270-5 ;C.M. long, longer in fruit, 0.5 c.M. in diam.; bracts of 

 the inflorescence lanceolate, acuminate, violet, 17 2 -2'/ 2 by 0.2-0.3 c.M. ; bracts 



