196 RUTACEAE 
1. BYRSONIMA L. C. Rich. Shrubs or trees. Flowers in terminal 
racemes, or panicles. Petals white, saree or purplish, reflexed. Stigmas 
acute. els Drap d united. Cot 
dons aces led. — About 100 M ica 
natives, mainly, of tropical Americ 
B. cuneata (Turez.) P. Wilson. Ever- 
—18 m 
gre l tree, mostly 3-18 
tall: leaf-blades spatulate to obovate-spatu- 
ate, 2—4 c ]ustrous m 
em. g: petals pink or white, turning 
yellowish or ; 7 mm. long, the blades 
reniform: pe 4—6 mm. in diameter. [B. 
lucida (Sw.) DC.] — (LocUsT-BERRY.) — 
Hammocks and low pinelands, eres 
n Fla. and aoe Keys.—(W. I.)— 
yea . 
Shrubs or trees or rarely herbs, often prickle-armed, with glandular- 
punctate tissues. Leaves alternate or opposite: blades simple or pin- 
nately compound, sometimes 1-foliolate. Flowers perfect or polygamous, 
mostly regular. Calyx of 3—5, or rarely more, sepals, or wanting. Corolla 
of 3-5, or aniy more, petals. Androecium of as many stamens as there 
About 110 genera and 950 species, most aani in ro and Australia. 
Fruit dry, follicular joi eae id. 
Flowers perfect: BD or more in each carpel: herbs. 
Tribe I. RUTEAE. 
Flowers dioecious or polyga Do ovules 1 or 2 in 
each earpel: shrubs or tree 
Famity 9. RUTACEAE—RwveE FAMILY 
Fruit dehiscent: a deep es ribe II. BL 
Fruit indehiscent: a Tribe III. PTELE 
Fruit fleshy, drupaceous or Pacer 
Fruit a drupe: ovary 1-celled. Tribe IV. AMYRIDEAE. 
Fruit a berry: ovary 2-several-celled. Tribe V. CITREAE. 
I. Rv 
Heavy-scented smooth herbs or partly Eds ants with yellow flowers and lobed 
capsules. 1. RUTA. 
II. ANTHOXYLEAE 
Shrubs or trees, often with pd stems and leaves. 2. ZANTHOXYLUM. 
PTE 
Unarmed shrubs or small trees vi EN flowers, the 
fruits winged all around. 3. PTELEA. 
IV. AMYRIDEA 
Unarmed aromatic shrubs or trees, with white —- and erect | 
clusters of dark fruits. 4, AMYRIS. 
V. CITREAE 
Stamens 6-10: carpels' 1-ovuled. 
Styles very short or e p ovary 5-celled. 2 GLYCOSMIS. 
Styles elongate, deciduo ary 3- or 4-celled. 6. TRIPHASIA. 
Stamens 20 or more: carne, Several ovale 
Leaves 3- foliolate : stamens distinct: fruit vu) pubescent. T. PONCIRUS. 
Leaves 1- -foliolate: Stamens more or less united: fruit 
glabrou 8. CITRUS. 
1. RUTA L. Herbs, sometimes woody at the base, heavy-scented. Leaf- 
blades divided. Flowers in corymbose or panicled cymes. Sepals 4 or 5, per- 
