AEACEAE. 35 



1. S. Etonia Swingle. Stem horizontal, S-shaped: leaf-blades deep-green, the 

 segments copiously filiferous: spadix erect or ascending: anthers about 2 mm. 

 long: seeds 10-13 mm. -wide. [S. megacarpa (Chapm.) Small.] — Pinelands. — 

 Scrub-palmetto. 



2. S. Palmetto (Walt.) E. & S. Stem 28 m. tall. Leaf -blades cordate at 

 the base; ligules about 10 cm. long: spadix spreading or drooping: anthers 

 about 1.5 mm. long: seeds 5-7 mm. wide. — Everglades, hammocks and pine- 

 lands. — F. K. {Bah., Cuba.) — Cabbage-palmetto. Cabbage-tree. 



3. SERENOA Hook. Armed shrubs or trees. Leaf-blades flabellate, 

 cordate' at the base: petioles with recurved spines. Stamens unequal, those 

 opposite the petals with broad filaments, those alternate with petals with 

 narrow filaments. Drupe and seed oblong. 



1. S. serrulata (Michx.) Hook. Rootstock elongate: stem horizontal or some- 

 times erect, becoming 2-7 m. tall: leaf-blades suborbicular, green or glau- 

 cous, 3-S dm. broad, cordate at the base; petioles with firm spines: petals 

 4-4.5 mm. long: drupes 15-25 mm. long. — Everglades, hammocks and pine- 

 lands. — F. K. — Saw-palmetto. 



4. ROYSTONEA O. F. Cook. Unarmed trees. Leaf-blades pinnate: 

 petiole nearly terete above, the sheathing bases very long. Spadix pendulous. 

 Petals valvate. Seeds reniform. 



1. R. regla (H.B.K.) O. F. Cook. A stately tree 30 m. tall, the trunk fusi- 

 form: leaf-blades 2.5-3.5 m. long, the larger segments 7-9 dm. long: perianth, 

 of the staminate flowers 6-7 mm. long, that of the pistillate barely i as large •- 

 drupes 12-14 mm. long, violet-blue. — Hammocks. — {Cuba, Ant.) — Royal-palm.. 



5. COCOS L. Unarmed trees. Leaf -blades pinnate: petioles rounded on 

 the back, the sheathing bases short. Spadix ultimately drooping. Sepals and 

 petals of the staminate flowers valvate, those of the pistillate flowers imbri- 

 cate. Drupe 3-angled, with a fibrous pericarp and a bony endocarp. 



1. C. nucifera L. A stately tree 30 m. tall: leaf -blades 3-5 m. long, the 

 numerous segments 5-7 dm. long: perianth of the staminate flowers fully 

 1 cm. long, that of the pistillate larger: drupes oval or ovoid, 2-3 dm. long: 

 endosperm enclosing a milky juice. — Coastal sand-dunes and hammocks. 

 Naturalized. — F. K. {Bah., Cuba, Ant.) — Cocoanut. Coco-palm. 



Order ARALES. 



Perennial, frequently bog or aquatic, herbs, in Lemnaceae, mere 

 floating thalloid bodies. Leaves mainly basal. Flowers complete or in- 

 complete, borne on a spadix accompanied by a spathe, or in Lemnaceae 

 1 or few in a pouch in the plant-body. Perianth inconspicuous or want- 

 ing. Fruit baccate or utricular. 



Family 1. ARACEAE. Arum Family. 



Flesliy, mostly acaulescent, plants. Leaves with simple or divided 

 blades. Flowers perfect, monoecious, or dioecious. Perianth of 4-6 scale- 

 like members, or wanting. Androecium of 4—10 stamens. Gynoecium of 

 1, or of several, united carpels. 



