4 ARECACEAE. 



1. COCCOTHRINAX Sarg. Unarmed shrubs or trees. Leaves with flabel- 

 late blades silvery or pale-scurfy beneath, and smooth petioles. Spadix rela- 

 tively short. Stamens mostly 9 : filaments distinct or nearly so. Style funnel- 

 form. Drupe black or purple-black. 



1. C. argentea (Lodd.) Sarg. A shrub or small tree. Leaf -blades 2-4 dm. 

 broad, the ligule 1-1.5 cm. broad: spadix 2-4 dm. long: mature pedicels 1-2 

 mm. long: drupe 7-10 mm. thick. SILVER-PALM. 



Pinelands and rarely in hammocks, E. Keys and F. Keys. (W. I.) 



2. SABAIi Adans. Unarmed shrubs, with horizontal or contorted root- 

 stocks. Leaves upright: blades flabellate, glabrous. Spadix upright during 

 anthesis. Spr.-sum. PALMETTO. 



Anthers ovoid : filaments thrice as long as the anther : drupes less than 10 mm. in 

 diameter. 1. S. glabra. 



Anthers oblong : filaments twice as long as the anther : drupes over 



10 mm. in diameter. 2. 8. Etonia. 



1. S. glabra (Mill.) Sarg. Rootstock straight or merely curved. Leaf-blades 

 glaucous or pale-green, scarcely if at all filiferous: spadix narrowly branched, 

 12 m. long, erect or ascending at maturity : corolla-lobes about 2 mm. long : 

 'seeds 5-6 mm. broad. DWARF-PALMETTO. BLUE-STEM. 



Low grounds, along or near streams, n. Fla. and the upper pen. (Cont.) 



2. S. Etonia Swingle. Eootstock S-shaped. Leaf-blades deep-green, copiously 

 filiferous : spadix widely branched, 5-8 dm. long, prostrate at maturity : corolla- 

 lobes 3-3.5 mm. long: seeds 10-13 mm. broad. SCRUB-PALMETTO. 



Finelands and inland sand-dunes, pen. Fla. (Endemic.) 



3. SERENOA Hook. Armed shrubs or trees. Leaves upright or spread- 

 ing: blades flabellate, cordate at the base: petioles with recurved spines. Sta- 

 mens unequal, those opposite the petals with the broader filaments. Drupe and 

 seed oblong. 



1. S. serrulata (Michx.) Hook. A shrub with sparingly branched stems, or a 

 tree, the trunk 9 m. tall or less, or usually horizontal: leaf -blades suborbicular, 

 green or glaucous, 3-8 dm. broad, cordate at the base ; petioles with firm spines : 

 petals 4-4.5 mm. long: drupe 15-25 mm. long. SAW-PALMETTO. 



Pinelands, hammocks, and low savannas, nearly throughout Fla., except on the 

 upper F. Keys. Spr. or all year southward. (Cont.) 



4. PAUROTIS O. F. Cook. Armed shrubs or trees. Leaves spreading: 

 blades flabellate: petioles with mostly upcurved spines. Stamens equal or 

 essentially so, the filaments broad. Stigmas terminal. Drupe globular. Seed 

 depressed. 



1. P. Wrightii (Griseb.) Britton. A shrub with many stems, or a tree, the 

 trunks solitary or several, 12 m. tall or less. Leaf-blades half-orbicular, 5-8 

 dm. broad, truncate at the base, the segments slenderly attenuate ; petioles with 

 flat orange teeth: petals about 1 mm. long: drupe 8-10 mm. thick. SAW CAB- 

 BAGE-PALM. 



In low savannas and hammocks in the Everglades near the Chokoloskee river and 

 in the vicinity of Cape Sable. (W. I.) Spr. 



5. RHAPIDOPHYLLUM H. "Wendl. & Drude. Armed shrubs or trees. 

 Leaves upright: blades flabellate, silvery beneath: petioles rough-edged, with 

 sheaths of interwoven spines and fibers. Spadix upright, slightly exserted from 

 the imbricate involucre. Stigmas introrse. Drupe of an ovoid type. 



