80 APOCYNACE^. 



seeded. Seeds cylindraceous or oblong, obliquely truncate at both ends, in a single row ; 

 the coat corky. Herbs. 

 H— -J— Disk of 2 oblong or linear glands alternate with the carpels : leaves opposite. 



3. VINCA. Corolla callous-constricted at the orifice ; the lobes broad. Stigma a viscid 

 ring between a rotately dilated upper and a lower hairy or bearded sterile portion, the 

 upper truncate and often 2-apiculate, the lower subtended by a reliexed membranous ring 

 or cup. Carpels few-many-ovuled, in fruit narrow terete follicles. Seeds oblong, trun- 

 cate, with rough-granulate coat. Radicle superior. 



* * Anthers acute, inserted at or below the middle of the tube : disk none : seeds comose. 



4. HAPLOPHYTON. Calyx 5-parted; the lobes linear-subulate. CoMla salverform 

 with open throat ; its tube about the length of the obovate lobes. Anthers short-sagittate 

 with the short bases rounded. Style rather short : stigma cylindraceous, 2-lobed at apex, 

 unappendaged. Follicles filiform, striate, several-seeded. Seeds linear-fusiform, fixed by 

 the middle, sessile, furnished with a deciduous coma at both ends. 



Tribe II. ECHITIDEJD. Anthers with the cells produced mto a sterile appendage 

 at base, connivent around the stigma and adherent to it by a point at the base of 

 the polliniferous portion. Ovaries 2, united only by the common style or stigma, in 

 fruit follicles containing (at least in om-s) comose seeds. Lobes of the corolla 

 almost always dextrorsely convoluie, and the leaves opposite. (Stamens in all 

 ours included.) 



* Calyx-tube by means of a thickish disk adnate to the back of the ovaries below : 

 corolla appendaged within : style hardly any. 



5 APOOYNUM. Calyx small, deeply 5-cleft. Corolla campanulate, 5-lobed, toward the 

 base bearing 5 small triangular-subulate appendages alternate with the stamens and 

 inserted rather higher. Stamens on the base of tlie corolla : filaments very short, broad : 

 anthers sagittate, acute. Disk fleshy at base, the free summit 5-lobed. Stigma ovoid, 

 obscurely 2-lobed. Follicles slender, terete. Seeds numerous, with a long coma at apex : 

 albumen little. 



* * Calyx wholly free : style filiform, girt below by a ring which is commonly extended 

 into a reflexed entire or 5-lobed membranous cup or appendage, less conspicuous in 

 no. 9 : seeds numerous and comose at the apex. 



•h- Stems erect, not twining. 



6. CYCLADENIA. Calyx 5-parted, naked within ; the lobes slender. Corolla funnelform 

 with dilated throat, in the base of which are 5 minute callous appendages, one behind 

 each stamen ; lobes ovate or obovate, not twisted in the bud. Stamens borne on the base 

 of the dilated portion of the tube : anthers sagittate, on short figments, the tips and the 

 basal lobes slender-cuspidate. Disk an entire shallow cup encircling the base of the 

 ovaries. Stigma capitate-5-angled and truncate, girt by a conspicuous 5-lobed reflexed 

 membrane. Follicles lanceolate, turgid, smooth. Seeds ovate, narrowed at the apex under 

 the copious coma. 



7. MACROSIPHONIA. Calyx 5-parted, multiglandular at base within; the lobes 

 slender. Corolla salverform, with a long tube and enlarged cylindraceous or funnelform 

 throat ; the lobes broad, dextrorsely convolute but sometimes sinistrorsely twisted in the 

 bud, often crisped. Stamens borne in tlie throat : filaments short : anthers oblong or 

 sagittate-lanceolate, mostly obtusely tipped, and the basal appendages obtuse. Disk of 

 5 fleshy and distinct or partly united scales. Stigma thickened and firm, 5-costate, with 

 entire or 2-cleft small apex, the base appendaged with 5 reflexed lobes or a 5-cleft mem- 

 brane. Follicles long and slender, terete. Seeds oblong. 



-t- -J— Stems twining, or at least sarmentose : calyx gland-bearing at base Avithin : corolla 

 wholly destitute of internal scales or appendages ; the lobes usually more or less 

 twisted (to the left, i. e. contrary to the overlapping) in the bud : filaments very short : 

 disk mostly 5-lobed or of 5 glands : follicles long and slender. 



8. ECHITES. Flowers comparatively large. Corolla salverform, funnelform, or with 

 abruptly dilated campanulate throat. Appendage of the stigma conspicuous and reflexed, 

 in the form of a reversed membranous cup or of 5 strong lobes. Inflorescence simple or 

 nearly so. 



9. TRACHELOSPERMUM. Flowers comparatively small. Corolla salverforrn or 

 somewhat funnelform. Tips of the sagittate and gradually acuminate anthers sometimes 

 exsertcd ; the basal lobes acute. Apex of style more or less thickened or obconical under 

 the narrow or inconspicuous ring of the stigma. Seeds linear, beakless. Inflorescence 

 open-cymose. 



