FEANGULACEAE. 87 



1. C. glabra Sw. Tree: leaflets 6-12; blades oblong with a cuneate base, 6-11 

 cm. long, crenate or crenate-serrate above the middle : sepals ovate, 2-2.5 mm. 

 long: jjetals cuneate-flabellate, 2-2.5 mm. long: capsules turbinate, 11-14 mm. 

 broad, stipitate.— Hammocks, Big Pine Key. Not recently collected. — (Cuba, 

 Ant.) 



Order RHAMNALES. 



Sbrulis, trees, or vines. Leaves typically alternate. Flowers regular, 

 sometimes imperfect or incomplete. Calyx present. Corolla present or 

 wanting. Androecimn of as many stamens as there are sepals. Gynoe- 

 cium of 2 or more united carpels. Ovary superior or nearly so. Fruit a 

 capsule or a berry, or drupaceous. 



Sepals manifest : petals involute : fruit capsular or drupaceous. 



Fam. 1. Fkangulaceab. 

 Sepals minute or obsolete : petals valvate : fruit baccate. Fam. 2. Vitaceae. 



Family 1. FEANGULACEAE. Buckthorn Family. 



Shrubs, trees, or vines. Leaf-blades simple, pinnately veined. 

 Flowers perfect or polygamous, or sometimes dioecious. Calyx of 4 or 5 

 sepals. Corolla of 4 or 5 petals, or wanting. Androecium of 4 or 5 

 stamens opposite the petals. Gynoecium of 2 or 3 united carpels. Fruit 

 capsular or drupaceous, sometimes separating into nutlets. 



Fruit pulpy, with a l-S-celled stone. 



Sepals crested. 1. Krugiodendkon. 



Sepals not crested. 2- Reynosia. 

 Fruit dry or berry-like, with 2-4 separating nutlets. 



Fruit not winged, seated in the persistent calyx. 3. Colubrina. 



Fruit winged, crowned with the sepals. 4. Gouania. 



1. KRUGIODENDRON Urban. Shrubs or trees. Leaves nearly opposite : 

 blades entire. Flowers perfect. Sepals 5, crested within. Petals wanting. 

 Stamens 5: filaments longer than the anthers. Drupe apiculate. 



1. K. ferreum (Vahl) Urban. Shrub, or tree becoming 9 m. tall, the bark 

 ridged: leaf -blades ovate or oval, 3-6 cm. long: sepals ovate: drupes sub- 

 globose or oval, 5-8 mm. long, black. [Ehamnidium ferreum (Vahl) Sarg.] — 

 Hammocks, U. keys, L. keys.— [E. K.]—(Bah., ^?i<.)— Black-ironwood. 



2. EEYNOSIA Griseb. Shrubs or trees. Leaves opposite: blades entire. 



Flowers perfect. Sepals 5, crestless. Petals wanting. Stamens 5: filaments 



longer than the anthers. Drupe apiculate. 



1. R. septentrionalis Urban. Tree becoming 9 m. tall, the bark scaly: leaf- 

 blades oblong, varying to ovate or obovate: sepals deltoid or ovate-deltoid: 

 drupes subglobose, oval, or obovoid, 1.5-2 cm. long, purple or nearly black. [B. 

 latifoJia Sarg. Not Griseb.] — Coastal hammocks and sand-dunes, U. keys, L. 

 keys, L. S. keys. — [E. K.] — (Bah.) — Red-ironwood. Darling-plum. 



3. COLUBRINA L. C. Rich. Shrubs or trees. Leaves alternate: blades 

 entire or toothed, sometimes 3-nerved at the base. Flowers perfect. Sepals 

 5, spreading, keeled within. Petals 5, folded around the stamens, clawless. 

 Stamens 5: anthers notched. Drupe slightly 3-lobed, the carpels separating, at 

 least at the top. 



Drupes 4-6 mm. in diameter : pedicel abruptly dilated into the hypanthium : leaf- 

 blades glabrate, not rusty-tomentose. 1- C. reclinata. 



Drupes 8-10 mm. in diameter : pedicel gradually dilated into the 



hypanthium : leaf-blades rusty-tomentose beneath. 2. C. Colubrina. 



