306 



THE FLORA. 



1 S. herba'cea. Carrion-floiver. Stem herbaceous, erect or reclined, without prickles. 



Lvs. ovate-obloug, T-veined. Flowers' 8-50 on each long peduncle, ill-scented. 



2 S. rotundifo'lia. Co.'juno/i Greenbrier. Vine green, stron^' and tlioniy. somewhat 4-an- 



gled. Leaves round-ovate, 5-T-veined, cusp-pointed. Peduucles a little longer (6-7") 

 than the petioles. Berries bluish-black. Thickets. l0-30f. 

 8 S. hispida. Vine terete, bispid with weak prickles if any. Lvs. thin, ovate, cuspidate. 

 Peduncle twice as long (!') as the petioles. Berries black. Thickets. 



Okder CXXXVII. ALISMAOEJ^. Alismads. 



Herbs growing in water, with the leaves parallel-yeined, and with the 

 -fioitners regular and not on a spadix ; the i^eriantli consisting of 

 se'pah and jpetals^ 3 of each, the former always green ; 

 ovaries free, 8 or more, separating into as many 1-seeded achenia. 



Analysis of the Genera. 



Lvs. 



§ Both the calyx and corolla greenish. 



rush-like {Arrow-grasses) b 



§ Corolla colored, white. Leaves mostly 



with a lamina a 



a Fls. 5 . Sta. 6. Carpels whorled. 



Water Plantain. Alisma. 1 

 a Fls. 5 . Stamens 9-24. Carpels in a 

 head. Echinodore. Echinodorus. 

 Sta. many. Carpels in a 

 Arroio-Jiead. Saoittaria. 2 

 Anthers ovate. Carpels 

 Trigloch. Triglochin. 

 linear. Car- 



SCHEUOHZEKIA. 



a Fls. S- 



head. 



b Lvs. radical 



1 seeded 



b Leaves cauline. Anthei 



pels 1-2-seeded. 



1. ALISMA. "Water Plantain. 



Flowers perfect. Stamens 6. Ova- 

 ries and styles numerous, collected into 

 a whorl, becoming in fruit many dis- 

 tinct, flattened achenia. — if Stemless 

 herbs, the leaves all radical. Flowers 

 in a panicle. 



A. planta'go. A common, smooth, handsome 

 inhabitant of ponds and ditches. Leaves 

 oval or ovate, abruptly acuminate, 7-9- 



Fig. 643. Sagittaria sagittifolia (com- 

 mon form), leaf and flowers. 4. One 

 of the pistils enlarged. 5. The pistil of 

 Alisma cut open, showing the seed and 

 curved embryo. 



