1141 
SAGITTARIA angustifolia. 
Narrow-leaved Sagittaria. 
——>——— 
POLYANDRIA POLYGYNIA, or MONGCIA POLY ANDRIA. 
Nat. ord, ALIsMACEA. 
SAGITTARIA 1L..—Flores moneci. Calyz trisepalus, abbreviatus, 
concayus. Petala 3, membranacea, plana. ¢3 Stamina indefinita: ova- 
ria nulla. 9; Stamina nulla: ovaria indefinita in receptaculo hemi- 
spherico imposita. Stzgmata totidem simplicia. Pericarpia rostrata, 
monosperma, indehiscentia, marginata. Herbs: palustres v. natantes 
(totius orbis). Folia sagittata v. rariis simplicia, petiolo longo lacunoso 
vaginante. Scapi multiflori, lacunost, verticillis superioribus masculis, 
inferioribus foemineis. Flores albdz. 
S. angustifolia ; foliis lanceolatis vix costiveniis, scapo gracili subramoso, 
pedunculis filiformibus subeequalibus petalis multd longioribus ; bracteis 
ovatis acuminatis. 
Folia radicalia, equitantia; petiolis 1}-pedalibus, semiteretibus, sursim 
attenuatis, in lamind lanceolatd, siccd costivenid, crudé avenia, exeuntibus. 
Scapus folits pauld longior, gracilis, subramosus. Bractee ovate, acumi- 
nate, pedicellis breviores. Pedicelli Jiliformes. Flores inferiores foeminei, 
superiores masculi. Sepala subrotundo-ovata. Petala subrotunda, sepalis 
dupld longiora, multd minora quam S. lancifolice. 
A native of Essequebo, whence its seeds were brought 
to Mr. Colvill by Mr. E. Davis. A pretty stove aquatic, 
flowering in October. 
This is very near the 8. lancifolia of North America 
and the West Indies, from which it differs in having smaller 
flowers, and narrower, less distinctly ribbed leaves. 
Leaves radical, equitant; petioles a foot and half long, 
half round, tapering upwards, terminating in a lanceolate 
lamina, which when dried is ribbed, when fresh destitute 
of veins. Scape a little longer than the leaves, slender, 
slightly branched. Bractee ovate, acuminate, shorter than 
the pedicels. Pedicels filiform. Lower flowers female, 
upper male. Sepals roundish, ovate. Petals roundish, 
twice as long as the sepals, much smaller than in Sagzé- 
taria lancifolia. 
J. L., 
