n CLASS XVI. ORDERS III and V. 



elastlcally with revolute valves. 39. 63 — pensylvanU 

 CU) (American watercress) branching, glabrous, 

 leaves pinnate, leafets angle toothed roundish-ob- 

 long obtuse, siliques narrow erect, w. — virginica, 

 leaves pinnate, leafets lanceolate 1 -toothed or eared 

 at the base. (In habit much resembles the shep- 

 herd's purse.) If. w — hirsu(a, leaves M'ithout sti- 

 pules, leafets roundish mostly repand-toothed peti- 

 oled, flowers tetrandrous. w. 



Sisymbrium. Calyx and corol spreading : silique 

 bursting, with a short terete beak, valves strait- 

 ish. 39. 63 — 7iasturtiuin^ (English watercress) si- 

 lique declined, leaves pinnate with sub-cordate leaf- 

 ets. If. r. Southern states — amphibium (water-ra- 

 dish) silique declined oblong ovate, leaves pinnati- 

 fid serrate, petals longer than calyx. %. w. 



SiNAPis. Calyx spreading : corol with strait 

 claws : glands between the short stamens and pis- 

 til, and between the long stamens and calyx : par- 

 tition extending beyond the valves of the silique, 

 ensiform. 39. 63. nigra, (mustard) silique glabrous, 

 leaves linear-lanceolate at top. ©. y. e. — al&Uj sili- 

 que hispid, leaves pinnatifid. e. 



CLASS XVI. MONADELPHIA. 



Order III. Triandria. 



SisYRiNCHiuM. Spathe 2-leaved: perianth : co- 

 rol superior, 6-cleft, tubular : style 1 ; capsule 3- 

 celled. 6. 18 — ancefiHy (blue-eyed grass) culm 2- 

 edged, leaves ensiform, fruit globular glabrous. 

 It.b. 



Order V. Pentandria. 



Passiflora. Calyx 5-parted, coloured : corol 

 5-petalled, on the calyx : nectary, a triple fila- 

 mentous crown within the petals : berry pedicelled. 

 3i. 97 — coerulea^ (passion flower) leaves palmate 5- 



