CLASSES IX. AND X. ORDERS I. and III. 45 



stem procumbent. (J), w. — hydrofii/iers (water-pep- 

 per) stamens 6, styles 2 ; spike filiform, nodding, 

 leaves spotless. ©. w-p — ficrsicaria-, (persicaria) 

 stamens 6, styles 2, peduncles smooth, stipules cii- 

 iate. ©. w-p. — fienaylvanicum^ styles 2, peduncles 

 bristly, stipules not ciliate. 0. p. — scandens, climb- 

 ing, leaves cordate. 2/.W. — convolvulus^ twining, 

 leaves heart-arrow form. 0. w — arifolium^ stem 

 prickly, leaves hastate. 2/ . r — virginicum, stamens 

 about 5, styles 2, coloured calyx 4-cleft, leaves 

 broad-ovate ciliate. %. w — maricimum^ flowers ax- 

 illary, stem erect, w. — sagitatum, stem decumbent, 

 prickly, leaves arrow-form. ©. w-p — orientale, 

 stamens 7, styles 2, leaves broad-ovate, stipules 

 hairy. Very tall. (2). r, e. — -fago/iyrumy (buck- 

 wheat) stem smooth, branching, e. 



CLASS IX. ENNEANDRIA. 



Order I. Monogynia. 



Laurus. Calyx 4 to 6-parted : corol o : nectar- 

 ies S, two-bristled glands, surrounding the germ : 

 drupe 1 -seeded. (Stamens vary from 3 to 14- — oft- 

 en dioecious — The calyx may be taken for a co- 

 rol.) 12. 27 — sassafras^ (sassafras) leaves 3-lobed 

 and simple. ^ . y. — benzoin, (spice-bush) leaves 

 simple, acute both ends. >2 . y. 



Order III. Trigynia. 



Rheum. Calyx none : corol 6-cleft, permanent ; 

 seed 1, 3-sided. 12. 28 — fialmatumy (rhubarb) 

 leaves palmate roughish. e. 



CLASS X. DECANDRIA. 



Order I. Monogy.ma. 



A. Flozuers many -Retailed, irregular. 



Podalyria. Calyx 5-cleft, somewhat 2-lipped ; 

 corol papilionaceous, wings of the length of the 



