4. MiTRASACME.] 91. LOGANIACE^. 



from above downwards. Seeds very many, minute, subglobose, testa 

 smooth reticulate. 



I. M. alsinoides, Br. 



A small very slender hei'b 3-6" higii, resembling one of the Caryo- 

 phyllaceae or Oldenlandise, with erect weak stem and opposite linear 

 or lanceolate leaves •2" long* which have raised glistening epidermal 

 cells (like those of Oldenlandia crijstallina). Flowers solitary axillary, 

 pure white, •12-15" long and about •!" diam. on slender pedicels 

 •5-1" long. Calyx "08", sepals somewhat cuspidate in fruit, capsule 

 •08". 



Singbhum! Hazaribag-h, in swamp, Clarke\ Fl., Fr. Oct.-Nov. 



FAM. 92. GENTIANACE^. 



Herbs (aquatic in Limnanthemum) with opposite, rarely alternate, 

 entire, simple (3-foliolate in a gen\is outside our area) entire leaves, 

 often basal-nerved. Flowers small or showy, regular or (Ganscora 

 and Hoppea) irregular especially in the stamens, mostly in ebracteate 

 cymes, sometimes clustered. Calyx inferior, lobes 4-5 imbricate in 

 bud. Corolla funnel-shaped or rotate, lobes imbricate or twisted to 

 the right. Stamens on the tube, alternate with the petals, some- 

 times unequal or some altogether suppressed, anthers dehiscing longi- 

 tudinally or by apical pores. Disc or of glands. Ovary free, 

 1-celled, or more or less 2-celled by intrusion of the parietal placentse. 

 Style 1, stigmas 2. Ovules numerous. Fruit capsular, often mem- 

 branous, rarely baccate. Seeds numerous, small. Albumen copious. 



I. Terrestrial herbs. Leaves opposite : — 



A. Flowers regular or nearlj- so : — 



1. Ovary 2-celled. Style filiform 1. Exaciim. 



2. Ovary 1-celled :— 



a. Style short or 0. Corolla with glands at base . . 2. Swerfia. 



b. Style slender 3. Erythrcea. 



B. Flowers irregular, usually only 1-2 stamens perfect :— 



Calyx tubular. Stigmas 2 4. Canscora. 



Calyx campanulate. Stigma subentire. Minute herbs . 5. Hoppea. 



II. Aquatic herbs with alternate or subopp. leaves . . .6. Limnanthemum, 



1. EXACUM, L. 



Stems often angular with usiially 3-5-basal-nerved leaves. Flowers 

 regular, or slightly zygomorphic, in terminal and axillary cymose 

 panicles. Calyx deeply 4-5-lobed. Corolla rotate with globose tube, 

 blue or white. Stamens on the throat, filaments short, anthers with 

 apical pores at length dehiscing to the base. Ovary more or less 

 completely 2-celled, style long, stigma small sub-capitate. Capsule 

 globose, septicidally 2-valved. Seeds veiy many, minute, subcuboid, 

 testa granular. 



A. Flowers -TS-l'S" diam. Stems 1-3 ft. high :— 



Fls. deep blue. Calyx wings small 1. tetragonum. 



Fls. with white base. Calj-x distinctly winged . . .2. bicolor. 



B. Fls. "5" diam., blue or white. Stem 3-12". Calyx winged : — 

 L. lanceolate or ell., subsessile, 3-nerved. Calyx-wing 



lanceolate ' . .3. pedunctdatum. 



L. ovate or broadly-ell., petioled, 4-7-nerved. Calyx-wing 



ovate 4. petiolare. 



566 



