Acnida 



AMARANTACE^ 

 Utricle indehiscent. 



133 

 Embryo annular ; 



erect, with short stalk, 

 cotyledons linear. 



WaterHemp. 



Species 3 or 4, natives of eastern N. America and West Indies. 



A. euspidata Bert, ex Spreng. Syst. m. 903 (1826). A. 

 australis A. Gray in Am. Natural, x. 489 (1876). . A. cannabina 

 Griseh. Fl. Br. W. Ind. 60 (1859) (non L.). (Fig. 41.) 



Acnida nispidata Bert. 



A, Portion of plant. 



B, Male flower. 



C, Dittx), with two perianth - segments 



removed. 



D, Female flower with bract and bracteoles. 



E, Fruit indicating outline of seed. 



F, Seed cut lengthwise ; c, cotyledon ; 



r, radicle ; e, endosperm. 



Banks of Ferry River ; marsh near Black River ; Harris ! Fl. Jam. 

 9047, 9760.— Florida, Trinidad. 



Stem 1-2 m. high, the lower part of the main stem very much swollen, 

 to 2'5 dm. br. Leaves lanceolate, 1-2 dm. 1. to 5 cm. br. Spikes panicu- 

 late, lax, drooping at the top. Male perianth 2-5 mm. 1.. Female flmver, 

 stigmas generally three. Utricle 2 mm. 1., with 3 acute angles, glabrous, 

 scarcely exceeding the bracts. 



5. CYATHULA Lour. 



Herbs, sometimes shrubby at base. Leaves opposite, stalked, 

 entire. Flowers clustered, clusters spicate, perfect flowers 1—3 

 in each cluster, surrounded by others imperfect, reduced to 

 perianth-segments with rigid, hooked awns (glochidia). Perianth 



