NEW YOt<K 

 77. RUBtAd'SJ^ 



DIVISION II.-GAMOPETAL^. 



FAM. 77. RUBIACEiE. 



Trees, shrubs or herbs, rarely scanclent, sometimes thorny, with 

 simple entire opposite or whorled leaves, often -with gland-pits in 

 the axils of the secondary nerves, and with inter-petiolar or intra- 

 petiolar usuallj- connate stipules, or leaves whorled without stipules. 

 Flowers small or minute to very large, solitary or in variously formed 

 inflorescences. Ovary inferior closely invested by the hypanthium, 

 which usually bears a toothed or lobed calyx. Corolla gamopetalous, 

 regular, 4-5-merous or rarely lobes up to 12, aestivation various. 

 Stamens usually as many as the petals, sometimes fewer where the 

 petals are more than 5, inserted in the tvibe or mouth of the corolla, 

 anthers 2-celled, usiially dorsifixed, sometimes sessile. Disc epigynous, 

 usually annular or swollen. Ovary usually 2-celled, very rarely 

 1-celled {Gardenia), rarely 3-9-celled. Style simple or cleft. Ovules 

 1 or more in each cell, usually attached to the septum ; on parietal 

 placentse in Gardenia. Fruit various. Seeds with fleshy or horny 

 albumen. Embryo straight or curved, cotyledons usually flat, some- 

 times semi-terete, radicle superior or inferior. 



The g-ermination in those species examined by me is epig-eal and the cotyledons 

 are fohaceons and grow considerably. It is noteworthy that interpetiolar stipules 

 are present in the cotyledons in Ixora. Gardenia and perhaps others. 



* Trees or shrubs. (Undershi-ubs in some, 6, 20 and 21.).:- 

 I. Flowers collected into dense heads on aglobose or some- 

 what oblong receptacle. Seeds often winged, 



A. Ovules numerous in each cell. 



1. Hypanthia confluent or connate. Cor.-lobes im- 



bricate 1. AnfJiocephahts. 



2. Hypanthia not connate. 



a. Cor.-lobes valvate. Receptacle bracteolate. 



Sepals distinct 2. Aclina. 



Sepals 3. Mitragyna. 



h. Cor.-lobes imbricate. Receptacle ebracteo'.ate 4. Nauciea. 



B. Ovule 1 in each cell. Hypanthia sometimes confluent. 



Fruit of free or connate drupels with 4 pyrenes . 5. Mori»da. 



II. Flowers not collected into heads on a globose receptacle 

 (but cymes sometimes capitate). 

 A. Ovules more than 1 in each cell. 



1. Corolla-lobes valvate. 



a. Fruit baccate. Flowers in terminal corymbose 



panicles. One calj-x-lobe usually white and 



foliaceous 6. Musscenda. 



b. Fruit capsular. Flowers in thyrsiform panicles 



Avith two foliaceous bracts. Seeds winged . 7. Hymenodictyon. 



2. Corolla-lobes twisted in bud. 



rt. Fruit capsular small, Fls, small panicled . 8. Wendlandia. 

 CvJ h. Fruit indehiscent, Fls. large or m.s. (exc, 



Cvi Hyptianthera), 



Crj i. Fls. small clustered axillary , , . , 9, Hypfianthera. 



V--" ii, Fls. large or m.s. 



t Bracteoles connate into a calj'culus. Fls. 



in axillary small cymes or fascicles . 10, BiplosiJora. 

 ^ H Bracteoles not connate into a calyculus. 



Stigma fusiform. 

 ^ ! Unarmed. Fls. in terminal corymbs , 11, Wehera. 



^ 28 419 



