ARISTOLOCHIACEAE (Birthwort Family) 

 ASARUM L. (Wild Ginger) 

 547 A. CANADENSE L. Common in rich damp woods. 



POLYGONACEAE (Buckwheat Family) 

 RUMEX L. (Dock, Sorrel) 



548 R. PATiENTiA L. (Patience Dock.) Near Wyoming, H. D. Dunn. 



549 R. BRiTANNicA L. (Great Water Dock.) Wayne County, Prof. Porter. 



550 R. CRISPUS L. (Yellow Dock.) Common. 



551 R. ALTissiMus Wood. (Pale Dock.) Wyoming. 



552 R. vERTiciLLATus L. (Swamp Dock.) Kingston pond holes. 



553 R. OBTUsiFOLius L. (Bitter Dock.) Common in ditches. 



554 R. ACETOSELLA L. (Sheep Sorrel.) A common weed. 



POLYGONUM L. (Knotweed) 



555 P. AvicuLARE L. Common in dooryards. 



556 P. AVICULARE, VAR. LiTTORALE Koch. Solomon's Gap, Prof. C. O. 



Thurston. 



557 P. ERECTUM L. Common. 



558 P. TENUE Michx. Top of Campbell's Ledge. 



559 P. LAPATHiFOLiuM L. Opposite Plymouth. 



560 P. AMPHiBiuM L. Lake Carey, Susquehanna River, Plymouth. 



561 P. AMPHIBIUM, VAR. HARTWRiGHTii Gray. Swamp at Orson, opposite 



Plymouth. 



562 P. MUHLENBERGii Wats. Opposite Plymouth. 



563 P. PENNSYLVANicuM L. Moist soil. Not uncommon. 



564 P. cAREVi Olney. Pocono Station along railroad bank. 



565 P. HYDROPiPER L. (Common Smartweed.) Common. 



566 P. ACRE HBK. (Water Smartweed.) Common in swamps. 



567 P. ORiENTALE L. (Prince's Feather.) Occasional in waste ground 



near gardens. 



568 P. PERSiCARiA L. (Lady's Thumb.) Frequent. 



569 P. HYDROPiPEROiDEs Michx. (Mild Water Pepper.) Shores of Susque- 



hanna. 



570 P. viRGiNiANUM L. Near Taylor depot, near Dunmore Cemetery. 



571 P. ARiFOLiuM L. (Halberd-Leaved Tear-Thumb.) Frequent in low 



ground. 



572 P. SAGiTTATUM L. ( Arrow-Leaved Tear-Thumb.) Common in 



marshy places. 



573 P. CONVOLVULUS L. (Black Bindweed.) Common. 



574 P. ciLiNODE Michx. Kingston, Tobyhanna. 



575 P. SCANDENS L. (Climbing False Buckwheat.) Common. 



576 P. DUMETORUM L. Opposite Plymouth. 



577 P. cusPiDATUM Sieb. and Zucc. Scranton, C. H. Scharar. 



FAGOPYRUM L. (Buckwheat) 



578 F. EscuLENTUM Mocnch. (Buckwheat.) Spontaneous in old fields. 



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