Hitchcock — Studies on Subterranean Organs. 141 



Nepeta Cataria, L. A strong crown. 



Scutellaria lateriflora, L. Slender white square rhizomes 

 with long internodes, and small scales. Wet places. 



Scutellaria parvula, Michx. Creeping moniliform rhi- 

 zomes. The internodes swell up into tuber-like bodies. 

 Moist sandv soil. 



Brunella vulgaris, L. Small crown. New plants forming 

 at base of old stems. Moist places. 



Leonurus Cardiaca, L. Similar to Nepeta. 



Plantago Rugellii, Dec. A thick cylindrical caudex, with 

 leaves from the upper portion and fibrous roots below. 

 Woods. 



Plantago lanceolata, L. A tap-root supporting a branched, 

 short-lived crown. A weed in meadows. 



Oxybaphus nyctagineus, Sweet. A strong fleshy tap-root 

 which may extend three or four feet below the surface. The 

 new shoots form at the base of the old ones or at various 

 places along the side of the root, near the top. Open 

 ground. 



Oxybaphus angustifolius, Sweet. A long slender vertical 

 root surmounted by knotty somewhat sunken crown. Prairie. 



Phytolacca decandra, L. Forms a large fleshy tap-root 

 which frequently branches. New stems form at the crown 

 on the summit which is a short distance below the surface. 

 Moist woods and barnyards. 



Rumex Patientia, L., altissimus, Wood, crispus, L. A 

 fleshy somewhat branched tap-root supporting a crown. 

 Moist places. 



Rumex venosus, Pursh. Extensive rhizomes often reaching 

 to considerable depth. Sandy soil. 



Rumex Acetosella, L. Buds on slender creeping roots. A 

 weed in fields. 



Polygonum Muhlenbergii, Wats. Extensive rhizomes. 

 Moist soil. 



Polygonum Virginianum,Lt. Small woody crown. Low 

 woods. 



Comandra pallida, A. DC. Root-like rhizomes, which 

 produce plants at intervals, each plant forming a crown, that 

 throws up one or more shoots each year. Stony hills. 



