KEY TO THE FAMILIES AND GENERA 



103 



EE. Stamens inserted on the 

 throat, rarely at base of 

 corolla ; f r. capsular or 2- 

 berried: style-branches fili- 

 form 16. P^DERIA Tribe. 



EEE. Stamens inserted at base of 

 corolla, rarely on throat: fr. 

 berry-like or indehiscent: 

 style entire or with long 



branches 17. Anthosperm.v 



[Tribe. 



//. Key to the Tribes, 



1. Nauclea Tribe. 



Calyx-tubes confluent: fr. a globose, fleshy syn- 

 carp: ovary 2-ceUed; ovules solitary, pendu- 

 lous I. C'ephal- 



[antkus. 



2. Cinchona Tribe. 



A. Corolla valvate. 

 B. Placentfe ascending from the base of the 



septum, or erect 2. Manettia. 



BB. Placentae adnate to the middle of the sep- 

 tum. 



c. Caps, septicidal 3. Cinchona. 



cc. Caps, loculicidal 4. Bouvardia. 



A A. Corolla imbricate; stamens inserted in the 

 throat. 



B. Sepals never bract-like 5. Luculia. 



BB. One of the sepals in some fls. in each infl. 

 developing into a large white persistent 



appendage 6. Emmenop- 



[terys. 



3. Condaminea Tribe. 



One calyx-lobe dilated into an ample colored 



blade 7. Pinckneya. 



4. Hedyotis Tribe. 



A. Calyx-lobes unequal: caps, loculicidal 8. Pentas. 



AA. Calyx-lobes equal; caps, loculicidal at the 



top 9. Houstonia. 



5. Rondeletia Tribe. 



Corolla imbricate, lobes equal or nearly so 10. Rondeletia. 



6. Musssnda Tribe. 



Infl. terminal, corymbose; ovary 1-2-celled: calyx- 

 lobes 5, 1 dilated and colored 11. Mitssa^nda. 



7. Hamelia Tribe. 



A. Corolla o-ribbed: berry 5-celled 12. Hamelia. 



AA. Corolla 4-o-lobed: berry 2-3-celIed 13. Hoffmannia. 



8. Gardenia Tribe. 



A. Infl. usually terminal. 



B. Corolla-tube short 14. Burchellia. 



BB. Corolla-tube long. 



c. Calyx .5-toothed 15. PosoQueria- 



cc. Calyx-lobes large and leafy 10. l.,ptn.ctinn. 



AA. Infl. usvially axillary. 



B. Style has a spindle or club-shaped stigma, 

 entire or 2-toothed. 

 c. Seed-coat membranous. 



D. Calyx-limb various; ovary 2-celled 17. Randia. 



DD. Calyx-limb often tubular; ovary 1- 



celled 18. Gardenia. 



CC. Seed-coat fibrous or subfibrous. 



D. Corolla-tube long and slender 19. Oxyaiithus. 



DD. Corolla-tube short. 



e. Calyx o-parted 20. Mxtrio- 



\ntigma. 



EE. Calyx truncate or o-toothed 21. Genipa. 



BB. Style-branches 2, distinct (except some- 

 times in Krau.ssia). 



c. Throat of corolla bearded 22. Kraussia. 



CC. Throat of corolla glabrous 23. Tricalyaia. 



9. Chiococca Tribe. 



Corolla valvate: infl. axillary, racemose; anthers 



dor^ifixed; stigma club-shaped 24. Chiococca* 



10. Alberta Tribe. 



Infl. terminal; the 2—4 calyx-lobes dilated; 



anthers pilose on back 25. Alberta. 



11. Vangueria Tribe. 



A. Drupe 1-2-stoned 26. Plectronia* 



AA. Drupe 3-6-stoned 27. Vangueria. 



12. Ixora Tribe. 



A. Fls. clu.stered in axils 28. Coffea. 



AA. Fls. in 2-3-forking corymbs. 



B. Style-branches 2, short, rarely connate: Ivs. 



leathery 29. Ixora. 



BB. Style very far exserted, the slender spindle- 

 shaped stigma usually long: Ivs. usually 

 membranous 30. Pavetta. 



13. Morinda Tribe. 



A. Fls. confluent in heads, which are many-fld., 



solitary or umbellate 31. Morinda. 



AA. Fls. free; calyx-limb 4-5-fid; corolla villous at 

 throat; stigma club-shaped, 2— 4-lobed: 



drupe 1^-stoned: infl. axillary 32. Damna- 



[canthus. 

 14. Galium Tribe. 



A. Corolla funnel-shaped or somewhat tubular. 

 B. Fls. 4-merous, with or without bracts, but 



no bractlets; style-branches subequal 33. Asperula. 



BB. Fls. 4-5-merous, bracted and with 2 



bractlets; style-branches unequal 34. Crucianella, 



AA. Corolla rotate or rotate-campanulate. 



B. Fls. 5-merous 35. Rubia. 



BB. Fls. 4-merou3 36. Galium. 



15. Psychotria Tribe. 



Infl. terminal; calyx usually 5-toothed; corolla 



5-lobed, rarely 4-lobed; tube usually short 37. Psychotria 



16. Paederia Tribe. 



A. Ovary 2-celled; stigma 2, capillary, twisted: 



fr. drupaceous: twining plant 38. Paederia. 



AA. Ovary 5-celled : f r. a caps. ; small upright 



shrubs 39. Leptodermis 



17. Anthosperma Tribe. 



A. Stamens inserted in throat; style-branches 4. ...40. Mitcheltn. 

 AA. Stamens inserted at or near base of corolla. 



B. Fls. bisexual; style shortly 2-cut; shrub. . . .41. Serissa. 

 BB. Fls. unisexual or bisexual; style 2-parted 

 to the base or near it. 



c. Plants are creeping herbs 42. Nertera. 



cc. Plants are shrubs or small trees 43. Coprosma 



Other genera incidentally described are: Catesbffia, CephaeUs, 

 Exostemma, Fernelia, Guettarda, Oldenlandia, Plocama, and 

 Sarcocephalus. 



104. VALERIANACE.^. 



A. Stamens 4 1. Patrinia. 



A A. Stamens 1, rarely 2: corolla-tube spurred, the 



limb spreading 2, Centranihus . 



AAA. Stamens 2; corolla-tube spurred, the limb 



2-lipped 3. Fedia. 



AAAA. Stamens usually 3. 



B. Calyx-limb finally pappiform 4. Valeriana. 



BB. Calyx-limb various but not pappiform, 5. Valerianella 



105. DIPSACACE.ffi. 



A. Stigma terminal, straight: fls. densely 

 crowded in the axils of the floral Ivs., form- 

 ing whorls after the manner of the mint 



family 1. Marina. 



AA. Stigma oblique or lateral, rarely straightish: 

 fls. in terminal heads. 

 B. Bracts of involucre generally herbaceous; 

 chaff of receptacle rigidly awl-shaped- 

 acuminate or spinescent ; corolla 4-fid 2. Dipaacua. 



BB. Rracts and chaff rigidly paleaceous, rarely 



sub-herbaceous; corolla 4-fid 3. Cephalaria, 



BBB. Bracts leafy, in about 2 series; chaff short, 

 or very narrow or abortive; corolla 4-5- 

 cut 4. Scabiosa. 



106. COMPOSITE. 

 /. Summary of Tribes. 



Series 1. Ttjbuliflor.e. Corollas tubular and regular in all 

 the bisexual fls. 



A. Heads composed entirely of disk-fls., 

 which are all perfect and never truly 

 yellow. 

 B. Style-branches awl-shaped, acute, 

 minutely hairy: Ivs. generally al- 

 ternate: anthers sagittate at ba.se.... 1. Vernonia Tribb. 



