PENTANDRIA - MONOGYNIA. 3*35 



120. RHAMNUS. Buck-thorn. 



R. alnifolius : unarmed; leaves oval, acuminate, serrulate, pubescent 

 on the nerves beneath ; flowers dioecious ; peduncles 1-flowered, ag- 



gregate ; calyx acute ; fruit turbinate. 

 HAB. 



. Rocky hills. May. Shrub small; leaves alternate; flower 

 small, greenish,, in axillary fascic. ; fruit black. 



121. VITIS. Vine. 



V. labrusca : leaves broad-cordate, angularly sub-3-lobed, cinereous- 



tomentose beneath ; racemes small ; berries large. 

 HAB. Woods and hedges. June July, T? ; leaves very large, at 



first ferrug. beneath ; Jlower greenish ; fruit purp. 

 V. vulpina : leaves cordate, acuminate, incisely toothed, smooth on 



both sides ; racemes loose, many-flowered ; berries small. 

 HAB. Woods and river-banks. June, !? ; leaves 3 4 in. broad; 



veins a little pubes. ; fruit sm., amber-col. 



122. CISSUS. 



C. hcderacea: stem climbing and rooting; leaves quinate-digitate, 

 smooth ; leaflets petiolate, oblong, acuminate, toothed ; racemes cy- 

 mose, dichotomous ; nectary 0. 



HAB. Woods. July, ^ ; leaves on long pet. ; Jlower greenish ; ber- 

 ry small, dark-blue, acid. 



123. RIBES. Currant and Gooseberry. 



* Stems without thorns. 



R. Jloridum : unarmed ; leaves punctate both sides, acutely 3-lobed, 



pubescent; racemes pendulous; calyx tubular; bracts longer than 



the pedicels. 

 HAB. Woods and hedges. April May, ^ ; shrub 3 4 ft . high 



Jlower greenish berry black. 

 R. tnjidum: leaves moderately lobed, smooth above, pubescent be- 



neath ; racemes loose, pubescent ; flowers rather flat, with the seg- 



ments of the calyx subtrifid ; petals spathulate, obtuse ; berries 



hairy. 

 HAB. Mountains. April May, fy ; leaves with subacute lobes- 



pet. purp. berry red. 

 R. rigens : branches straight ; leaves acutely lobed and dentate, reticu- 



late-rugose, pubescent beneath ; racemes rather loose, many-flowered 



becoming stiffly erect ; berries hispid. 

 HAB. Mountains. May, ^7 ; leaves on long pet. raceme 6 10^/Z 



-Jlower purp. berry red. 



* * Stems thorny. 

 R. triftorum : spines subaxillary ; leaves smooth, 3 Globed, inciseh 



