ORDER CXXXVIII. AUACEiE. 541) 



10, hairy. Capsules mucronato. — White. If. April — Juno. In wet 

 pine-ban-ens. Very common. 4 — 5 inches. 



5. S. pusil'la, (Mich.) Leaves linear, obtuse, short. Scape simple. 

 Flowers few ; only one usually fertile. — Muddy banks. Georgia to 

 New York. 2 — i inches. Dwarf Arrowhead. 



Genus IL— ALIS'MA. L. 6—12. 

 (From the Celtic alls, water.) 



Sepals 3, persistent. Petals 3. Stamens G. Ovaries and 

 etyles numerous. Capsules numerous, indehiscent, distinct, 1- 

 seeded. 



1. A. planta'go, (L.) Stem none. Leaves cordate, ovate, 9-nerved, 

 on long petioles. Scape triangular, 1 — 2 feet. Flowers in compound, 

 verticillate panicles. Fruit obtusely triangular. — White. If. July 

 — Aug. In the water. 1 — 2 feet. 



Genus III.— TRIGLO'CHIX. 6—3. 



Perianth 6-leaved. Stamens 3 — 4. Stif/mas 3. Capsules 

 3 — 4, opening at the base. Seed solitary. 



1. T. trian'drum, (Mich.) Leaves terete, linear, as long as the scape, 

 erect, sheathing ; scape terete. Flowers numerous. Anthers sessile. 

 Capsules 3 — 4, united by a spongy membrane. — July to August. In 

 sands on the coast. 6 inches. 



FLOWERS INCOMPLETE, WITHOUT A PROPER PERIANTH. 



Order CXXXVIII.— ARA'CE^. {Arum Family.) 



Flowers monoecious, arranged upon a naked spadix, or with 

 a spathe. Perianth 3-leaved, 4 — G-parted. Stamens 3 or 6. 

 Anthers wedge-shaped. Ovary superior, 1-celled, with a soU- 

 tary, pendulous ovule. Style short. Stigmas Hfiear, 1 or 2. 

 Fruit indehiscent, 1-celled, 1 -seeded. Leaves usually ensitorm. 

 Sp)adix with or without a spathe. Herbaceous plants, grow- 

 ing in marshes. 



ANALYSIS. 



1. Flowers perfect ' 



Flowers monoecious 



2. Floating: plants Pistia^ S 



Not floating plants 



3. Leaves long, narrow • • •'■''''!''"^' \ 



Leaves broad Oronttum, 6 



4. Floating plants Umna, 7 



Not floating plants 



5. Flowers in globular heads ^^'"''^"t.!!!,"!: J 



Flowers in long spikes lypha, I 



Flowers on a spadix 



6. Spadix naked at the summit )^.1^I,^J1" \ 



sfadix covered with flowers taladium, % 



