134 PRACTICAL BOTANY. 



Siliques terete, awl-shaped, flattish, or obscurely 4- 

 to 6-sided, sometimes curved. Valves 1-to 3-nerved. Calyx 

 open. Leaves twice pinnatifid or runcinate. 



Sisymbrium. 



126. (99.) Leafless herbs, with scales or bracts in place 

 of leaves, tawny, reddish, or whitish. Style longer than 

 the ovary, hollow. Flowers several in a scaly raceme, all 4- 

 petalled and 8-androus, excepting the terminal one, which is 

 usually 5-petalled and 10-androus. 



Monotropa Hypopitys, L. 



Leafy plants 127 



137. Trees or shrubs, with opposite digitate leaves. 

 Stamens habitually 7 (rarely 6 or 8). Flowers in a termi-, 

 nal thyrsus or dense panicle 230 



An annual herb, with alternate, 3-foliolate leaves. 

 Stamens usually 11. Sepals and petals 4, the latter with 

 claws and notched at the apex. Receptacle bearing a gland 

 at the base of the ovary. Pod linear, or oblong, turgid, 

 many-seeded, glandular-pubescent. Fetid, clothed all over 

 with a clammy pubescence. Folanisia graveoleus, Raf. 



138. (98.) Shrubs 129 



Herbs 131 



139. Styles or sessile stigmas 4 or 5 130 



Styles 2. Petals strap-shaped, yellow, curled and 

 twisted, about 1 inch long. Calyx with 2 or 3 bractlets at 

 the base, 4-parted, cohering with the base of the ovary. Pod 

 woody, 2-carpelled, 2-beaked. Leaves oval, or obovate, acu- 

 minate, wavy-tobthed. Flowers in axillary clusters on thick 

 stalks, a cluster consisting of 3-4 involucrate, usually 3-flow- 

 ered glomerules. Only 4 of the 8 stamens fertile. 



Hamamells Virginica, L. 



130. Petals oval or obovate, obtuse. Flowers mostly 

 perfect, the rest abortive. Drupe with 4 bony, ribbed nut- 

 lets. Flowers single, or clustered near the base of the young 

 branchlets. Leaves serrate, crenate, or sometimes spinously 

 toothed. Ilex (863). 



