46 AMAKANTHACEAE. 



Spikes long-peduncled : calyx pedicelled : sepals, at least 4, 



nearly equal. 



Peduncles shorter than the leaves : sepals glabrous. 4. A. Moquinii. 



Peduncles surpassing the leaves : sepals pubescent. 



Stems minutely pubescent with appressed hairs : an- 

 thers on filaments equalling them in length. 5. A. floridana. 

 Stems pubescent with ascending or spreading hairs : 



anthers sessile or nearly so. 6. A. brasiliana. 



1. A. repens (L.) Kuntze. Plants herbaceous, with prostrate or creeping 

 branches 1-5 dm. long: leaf -blades broadly spatulate, oval or ovate, 8-20 mm. 

 long, usually abruptly pointed: sepals lanceolate or ovate-lanceolate, pubescent, 

 the larger ones becoming about 4 mm. long, abruptly pointed: filaments tri- 

 angular or lanceolate. Hammocks and waste places, Key West. (Bah., Cuba, 

 Ant.) 



2. A. polygonoides (L.) E. Br. Plants similar to A. repens, but with less 

 pubescent foliage or glabrate: leaf-blades narrowly spatulate to elliptic, 0.5-2 

 cm. long, obtuse or acute: sepals oblong to elliptic, glabrous, or sparingly 

 pubescent at the base, the larger ones becoming about 5 mm. long, gradually 

 pointed: filaments subulate. Hammocks and open sandy places, Key West. 

 (Ban., Cuba, Ant.) 



3. A. maritima J. St.Hil. Stem and branches prostrate, 2-11 dm. long, gla- 

 brous: leaf -blades cuneate, obovate, or elliptic, 1.5-6 cm. long: sepals ovate 

 to ovate-lanceolate, slightly acuminate, glabrous, the outer ones becoming 5 

 mm. long: staminodia with broad bases. Coastal sand-dunes and hammocks, 

 U. keys, L. keys. [E. K.] (Ber., Bah., Cuba, Ant.) 



4. A. Mociuinii Webb. Stem 3-8 dm. tall, glabrous or nearly so: leaf -blades 

 broadly ovate, 4-8 cm. long: sepals oblong-lanceolate, becoming 3.5 mm. long, 

 glabrous or nearly so. Sea-shore, Key West. 



5. A. floridana (Chapm.) Small. Stem and branches diffuse, 6-14 dm. long: 

 leaf-blades lanceolate to elliptic, 1.5-6 cm. long, glabrous or nearly so, at 

 least at maturity: sepals lanceolate, becoming about 4 mm. long, sparingly 

 pubescent. Hammocks and sandy shores, U. S. keys, U. keys, L. keys. [E. K.] 



6. A. brasiliana (L.) Kuntze. Stem 5-20 dm. tall: leaf -blades lanceolate to 

 oblong-lanceolate, 3-10 cm. long: sepals oblong-lanceolate, becoming about 4.5 

 mm. long, copiously pubescent. Sandy hammocks and thickets, L. keys, L. S. 

 keys. (Ant.) 



6. PHLLOXERUS E. Br. Herbs with prostrate or creeping branches. 

 Leaves opposite: blades narrow. Flowers perfect, in dense head-like spikes. 

 Sepals 5, very unequal, the outer ones, at least, obtuse. Filaments united at 

 the base. Staminodia wanting. 



1. P. vermicularis (L.) E. Br. Plant somewhat succulent, the branches 2-18 

 dm. long: leaf -blades half-terete, linear to clavate, 1-3.5 cm. long: spikes 1-2.5 

 cm. long, silvery- white : sepals 3.5-4 mm. long, the outer oblong, the inner 

 lanceolate. [Lithophila vermicularis (L.) Uline.] Coastal sand-dunes and 

 damp shores, and waste places, U. S. keys, U. keys, L. keys, L. S. keys. [E. K.] 

 (Bah., Cuba, Ant.) 



7. TRESINE E. Br. Herbs with erect stems. Leaves opposite: blades 

 broad. Flowers dioecious, paniculate. Sepals 5, equal, acute or acuminate. 

 Filaments united at the base. Staminodia wanting. Stigmas sessile. 



1. I. paniculata (L.) Kuntze. Plants 6-12 dm. tall, glabrous: leaf-blades 

 ovate or narrowly lanceolate, 5-10 cm. long: sepals lanceolate or nearly so, 1 

 mm. long, those of the pistillate flowers woolly without. Hammocks and sand- 

 dunes, U. S. keys, U. keys, L. keys. [E. K.] (Bah., Cuba, Ant.) 



