280 



APETALOUS OKDERS» 



507. LArRACE^, the Laurel Tribe. — Trees or shrvhs. Leaver 

 alternate, entire. Cahjx 4:-6-cleft, usually in two rows, aestiva- 

 tion imbricated. Stamens oj^posite the segments of the calyx, 

 usually twice their number. Ovary superior, 1-celled. Fruit 

 baccate or dru})aceous. Seed destitute of albumen ; emhryo 



a. Properties : aromatic and fragrant. 



Genera. — Laiirus, Cinnamonum, Camphora, Sassafras. 



. 50S. TiiYMELACE^, the Da])Tine Trihe. — Tinder shriibs. Leaves 

 alternate or opposite, entire. Calyx inferior, tubular, 4:-5-cleft, 

 colored. /(9to??2(?n5 8, or equal in num- Fig. 203. 



ber to the segments of the calyx, and 

 opposite them, i^iserted in the tube. 

 Ovary free, 1-celled. Fruit nut-like 

 or drupaceous. Seed solitary, pendu- 

 lous, albumen wanting, or thin and 

 fleshy ; emhryo straight. 



a. Properties : the bark is acrid and irritant ; 

 fruit narcotic. 



Genera. — Dirca, Daphne. 



Fig. 203. Dirca palustrls (leather-wood), a shrub ; 

 leaves alternate or scattered, sessile, or nearly so, 

 acute at both ends, unfolding after the flowers ; 

 at a is a flower magnified, showing the stamens 

 exsert. 



509. Eleagnace^, tlie Oleaster Trihe. — Trees or shruhs, cov- 

 ered with scurf. Leaves alternate or opposite, entire. Flowers 

 usually dioecious. Calyx tubular, persistent. Stamens 3, 4, or 

 8, sessile. Ovary free, 1-celled. Fruit crustaceous, inclosed in 

 the enlarged, succulent calyx. Seed erect ; emhryo straight, in 

 thin fleshy albumen. 



a. Properties : fruit sometimes edible. 

 Genera. — Hippophae, Eleagnus. 



510. Santalace^, the Sandalwood Trihe. — Trees or shruhs. 

 Leaves alternate, entire. Flowers small, rarely dioecious. Ca- 

 lyx adherent, 4-5-cleft, valvate in aestivation. Stamens 4 or 5, 

 oj)posite the segments of the calyx, and inserted into their 

 bases. Ovary 1-celled; ovides 1 to 4, pendulous from the 

 summit of a central i^lacenta. Fruit nut-like or drupaceous. 

 Seed solitary ; emhryo minute in the axis of fleshy albumen. 



a. Properties : some plants of tliis order are astringent, others yield fragrant 

 wood. 



Genus. — Thesium. 



511. Kyssace^, the Tupelo Trihe. — Trees. Leaves alternate, 

 entire. Floicers dioecious or polygamous. Calyx adherent, 

 5-10-parted. Stamens long; filaments distinct; anthers 2- 

 celled, adnate, introrse. Ovary 1-2-celled; armies solitary, 



