PIOECI'A jflEXANDRIA. 



701 



lis, laevissirae cordalis,j acuminate, slightly cor- 



quinquenervibus. 



date, 5-nerved. 



Sp. pi. 4. p. 779. Walt. p. 245, Mich. 2. p. 237. Pursh, 1. p. 250. 

 Nutt. 2. p. 23S. 



Stem terete, sometimes slightly angled^ flexuoiis, armed with small acute 

 prickles. Leaves cordate, nearly round, mucronatej entire, 5 — 7 nerved, 3 

 more distinct than the others, paler or glaucescent underneath. (Berr/e«, 

 spherical- Mich.) 



Grows in rich shaded soils* 

 Flowers June. Pursh. 



12- CaDUCA, 



Lin, 



s. 



V a t i s. 



acuieata 



? 



foliis 



mncrgnatis, 



f 



membranaceis, 5 neryi 

 us; pedunculo commu 



Prickly; 



leav 



cs 



o 



vatc, mucronate, mem- 

 branaceous, 5-nervedr 



common 



peduncle 



than 



ni vix petiolis Jongiore. ( scarcely longer 



the petioles, 



Sp. pi. 4. p. 7S0. Pursh, 1. p. 250. Nutt. 2. p. 238. 



Stem flexuous, sometimes angled, very thinly armed with prickles. 

 Leaves annual, ovate, entire, mucronate, with 3 nerves as usual more dis^ 

 tinct than the rest, when young often acuminate, very tJiin, on petioles 

 about half an inch long. Flowers n\ axillary umbels, the pedicel as long as 



the common peduncle. 



Grows in dry fields. Pursh. 



Flowers June— July. 



Very common around ponds. 



13. Tamnoides. Lin. 



S. caule aculeato, te- 

 reti; foliis bvato oblqn- 

 gis, acutis, sub-pandu- 

 rjfiformibus. 



obsolete 

 cordatis, quinquenervi- 

 '>us, pedunculo commu- 



*ii petiolis longiore. 



Sp. pi. 4. p. 780. Nutt. 2.' p. 238. 

 S. Panduratus. Pur&h, 1. p. 251. 



Stem prickly, terete; 



knaves ovate oblons? 

 acute, slightly panduri- 



form, 

 date 



>*■• 



9 



obsoletely cor 

 5-nerved: com 



mon peduncle 

 than the petiole. 



longer 



