374 ICOSANDRIA - DI-PENTAGYNIA. 



ly lobed and serrate, petioles and the pubescent calyx glandular 



flowers pentagynous. 

 HAB. Woods. May. A large shrub ; spines long ; Jl. corymb.^ 



wh. ; fr. red, edible. 

 C. cordata : thorny ; leaves cordate-ovate, pinnatifid, lobed and an- 



gled, smooth; petioles and calyx without glands; flowers penta- 



gynous. 

 HAB. Hedge rows and river brinks. A large shrub; corymbs, comp. 



fr. red, glob. 

 C. pyrifolia : thorny or unarmed ; leaves ovate-elliptic, incisely ser- 



rate, somewhat plicate and hairy ; calyx villous ; segments linear- 



lanceolate, serrate ; flowers trigynous. 

 HAB. Rocky woods, &c. June, 1}. ; leav* large, sublob. ; pedunc. 



and cat. foment. 



229. SORBUS. Mountain Ash. 



S. americana : leaves pinnate ; leaves somewhat equally serrate, and 



with the common petiole very smooth. 

 HAB. Mountains. May. A large shrub ; leafl. 7 yairs ; corymbs 



term. ; fr. fulv. 



230. ARONIA. 



A. arbutifolia: unarmed; leaves ovate-oblong, acute, crenulately 



serrulate, tomentose beneath; flowers in corymbs; calyx tomen 



lose. 

 HAB. Low thickets. May. Shrub 24 feet high ; fruit scarlet, 



sweetish and astring. 



b. melanocarpa : leaves beneath, and the calyx smooth ; fruit black. 

 HAB. Mountains ; rarely in Dogs. Leaves narrower ; fruit black. 

 A. botryapium ; unarmed ; leaves cordate, oval, conspicuously acu- 



minate, glabrous when mature ; flowers in racemes ; petals linear- 



lanceolate. 

 HAB. Low grounds. May. A small tree ; young leaves silky ; fr. 



purp., eatable. 

 A. ovalis : unarmed ; leaves roundish-elliptical, acute, smooth ; flow- 



ers in racemes ; petals obovate ; germens and segments of the calyx 



pubescemt. 

 HAB. Swamps. A small shrub ; her. black and eatable. 



231. SPIRAEA. Meadow-sweet. 



S. salicifolia : leaves lanceolate, acutely serrate, smooth ; racemes ter- 



minal, compound ; flowers pentagynous. 

 HAB. Wet meadows. July. Stem 2 4/eeJ high ; leaves obtuse or 



acute ; flower wh. 

 S. tomentose: leaves ovate-lanceolate, unequally serrate, tomento-*e 



beneath; racemes terminal, compound, crowded, flowers pentagy- 



. Low grounds. July Aug. Suffrut . 24 feet high ; 

 slong. ; Jl. purp. 



