180 ELEMENTS OF BOTANY. 



IV. OLEA. 



Trees or shrubs ; leaves evergreen, opposite, simple, coria- 

 ceous ; flowers in axillary racemes or panicles, fragrant ; 

 calyx 4-toothed, persistent; corolla short-salver-form, 4-lobed ; 

 stamens 2, exserted ; stigma globose or 2-lobed ; fruit a 1-2- 

 seeded drupe. 



1. O. Americana L. American Olive. A small tree ; Lark 

 smooth, light gray ; leaves thick, elliptical to obovate, petioled, entire, 

 smooth and shining ; racemes axillary, shorter than the leaves ; flow- 

 ers polygamous or dioecious, bracted ; drupe ovoid, dark purple, 

 bitter and astringent. March-April. Along streams and margins 

 of swamps ; more abiuidant near the coast. 



2. O. fragrans Thunb. Sweet Olive. A small tree ; leaves 

 thick, lanceolate-oblong, petioled, serrate, smooth and shining; flow- 

 ers in axillary corymbs, white or pink, very fragrant ; drupe globose, 

 black. March-May. Introduced from China and widely cultivated. 



101. LOGANIACEiE. LOGANIA FAMILY. 



Herbs, shrubs or twining vines ; leaves simple, opposite, 

 connate, or the bases connected by a stipular line ; flowers 

 perfect, regular, in spikes or cymes, or axillary and solitary ; 

 calyx tube free from the ovary, 4-5-lobed ; corolla tubular 

 to campanulate ; stamens as many as the lobes of the corolla 

 and inserted in the tube ; ovary mostly 2-celled, style sin- 

 gle, stigma 2-5-cleft ; fruit a 2-valved, few- or- many-seeded 

 capsule. 



I. gelsemium: 



Twining woody vines ; leaves evergreen, opposite, bases 

 connected by a stipular line ; flowers in bracted axillary or 

 terminal cymes ; pedicels scaly-bracted ; calyx 5-parted, per- 

 sistent ; corolla funnel-form, 5-lobed, the lobes rounded ; sta- 

 mens 5, inserted near the base of the corolla tube, anthers 

 oblong-sagittate ; ovary 2-celled, style 1, deeply 4-parted ; 

 fruit an oblong, compressed, 2-celled capsule, seeds several, 

 flattened and winged. 



