33 CLASS III. ORDER iL 



Monarda. Calyx cyliudric, striated* 5-toothed : cor- 

 ol ringent, upper lip somewhat linear, involving the fila- 

 ments. 



Salvia. Calyx tubular, 2-lipped, under lip 2-toothed : 

 corol ringent : filaments affixed to pedicels by their sides. 



Cottinsonia. Calyx tubular, 2-lipped: corol unequal, 

 tinder lip many-cleft, capillary : one perfect seed. 

 D. Corol superior. 



Circaea. Calyx 2-leaved : corol 2-petalled : capsule his- 

 pid, 2-celled, not gaping ; cells I -seeded. 



ORDER II. DIGTNIA. 



Jlntlwxanthum. Calyx, glume 2-valved, 1 -flowered : 

 corol, glume 2-valved, acuminate, awned : seed 1. 



CLASS III. TRIANDR1A. 



ORDER I. MONOGYNIA. 



A. Corol superior. 



Crocus- Spathe radical : corol funnel-form, with a 

 long slender tube : stigma deep-gashed, crested. 



Iris. Calyx, spathe 2-valved : corol 6-parted, divisions 

 alternately reflected : stigmas petal-like. 



B. Corol inferior. 



Xyris. Calyx, glume 2-valved, in a head : corol 3- 

 petaJled, equal, crenate : capsule 3-valved, many seeded. 

 C. Plants grassy : valves of the calyx glume-like. 



Cyperus. Glumes chaffy, scales imbricated 2-ways : 

 seed single, beardless : spikelets compressed. 



Stirpus. Glumes chaffy, scales imbricated every way : 

 seed single, naked, surrounded with hairs or bristles. 



Trichophorum. Calyx, scales imbricated every way : 

 seed beset with capillary bristles, which at length project 

 out, always 6 in number : spikelets ovatish. 



ORDER II. DIGTNIA.. 



The proper Grasses. 

 A. Glume l-Jiowered ; spiked. 



Oryzopsis. Calyx 2-valved, lax, obovate : corol te- 

 re^tisli-ovate, leathery : valves 2, outer oner awned at the 

 apex : appendages 2, linear, chaffy. 



