ANACARDIACE^. (cASHEW FAMILY.) 71 



Order 35. BURSERACE^:. (Torch-Wood Family.) 



Trees or shrubs, with resinous juice, unequally-pinnate or trifoli- 

 olate commonly dotted leaves, and small regular flowers in axillary or 

 terminal racemes or panicles. — Calyx free from the 1 - 5-celled sessile 

 ovary, 2 - 5-lobed, persistent. Petals 2-5, alternate with the calyx- 

 lobes, and inserted under an orbicular or annular disk at the bottom 

 of the calyx, mostly valvate in the bud. Stamens twice as many as 

 the petals, and inserted with them : anthers introrse. Ovules anatro- 

 pous, pendulous, mostly two in each cell. Stigmas 1 - 5. Fruit dru- 

 paceous, dry; the pericarp often splitting into valves. Albumea 

 none. Radicle superior. 



1. BURSEEA, Jacqiiin. 



Flowers polygamous. Sterile Fl. Calyx 3-5-parted. Petals 3-5, valvate 

 in the bud. Stamens 6-10. Disk creuulate. Fertile Fl. Calyx 3-pai'ted. 

 Petals 3. Stamens 6. Ovary ovate, 3-celled. Style short : stigma 3-lobed. 

 Drupe oblong, 1-seeded; the pericarp 3-valved. Cotyledons wrinkled. 



1. B. gummifera, Jacquin. Leaves alternate, 3 - 9-foliolate, long-peti- 

 oled, deciduous ; leaflets stalked, opposite, ovate, acuminate, entire, rounded 

 or sliglitly cordate at tlie base, at leugtli smooth on both sides; flowers small, 

 whitish, in axillary racemes ; drupe purplish. — South Florida. — A large tree. 



Order 36. ANACARDIACE^. (Cashew Family.) 



Trees or shrubs, with milky or resinous juice, alternate exstipulate 

 dotless leaves, and perfect or polygamous regular flowers. — Sepals 

 and petals 4-5, imbricated in the bud. Stamens as many as the 

 petals, or twice as many, and inserted with them on the base of the 

 calyx. Ovary solitary, with a single ovule ascending from the base of 

 the cell. Style simple or 3-cleft. Fruit druiJaceous. Seeds without 

 albumen. Radicle curved. 



1. RHUS, L. Sumach. 



Calyx 5-parted. Petals .5, inserted with the 5 stamens on the disk which 

 surrounds the base of the ovary. Stigmas 3. Drupe dry. Radicle superior, 

 incurved. — Shrubs or small trees. Leaves pinnate or trifoliolate, rarely 

 simple. Flowers small, greenish, in spikes or panicles. 



* Flowers polijgamous, in a close terminal panicle: drupe red, hair// : leaven 

 pinnate. {Not jioisonous.) 

 1. R. typhina, L. Branches, petioles, and drupes villous ; leaflets 17-21, 

 lanceolate, acuminate, serrate, smooth, ])ale beneath. — Dry hillsides in the 

 upper districts. June - July. — A slirub or small tree. 



