80 APOCYNACE^. 



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

 the coat corky. Herbs. 

 -I- -t— 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 reflexed 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 6-parted; the lobes linear-subulate. Corolla salverforra 

 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. ECHITIDE^. Anthers with the cells produced into a sterile appendage 

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

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

 fruit follicles containing (at least in ours) comose seeds. Lobes of the corolla 

 almost always dextrorsely convolute, 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 APOCYNUM. Calyx small, deeply 5-cleft. Corolla campanulate, 5-lobed, toward the 

 base bearing 6 small triangular-subulate appendages alternate with the stamens and 

 inserted rather higher. Stamens on the base of the 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. 



-1— Stems erect, not twining. 



6. CYCLADENIA, Calyx 6-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 filaments, 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 the 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-eleft small apex, the base appendaged with 5 reflexed lobes or a 5-cleft mem- 

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



•»— -1— Stems twining, or at least sarmentose : calyx gland-bearing at base M-ithin : 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. TRACHELOSPERMXJM. Flowers comparatively small. Corolla salverform or 

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

 exserted ; 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. 



