35^ Muhlenbergia, Volume 2 



POTAMOGETON RlCHARDSONil (Rennelt) Rjdb. 4. Richard- 

 son's pond weed. In Willamette liver below Portland; infre- 

 quent. May, June. 



POTAMOGETON FOLIOSIS Raf. 4. Leafy pond weed. In ponds, 

 Columbia slough; infrequent. May, June. 



Zannichelua [Mich.] L. Horned pond weed. 

 Zanniciielua palustris L. I. Horned pond weed. In 

 ponds near Vancouver feriy. May, Jane. 



Naias L. Naiad. 

 Naias feexius (Willd.) K. & S. i. Slender Naiad. On 

 bars in the Willaniclle river below Portland. May, June. 



ALISMACEAE DC. Water plantain Family. 

 Alisma L. Water plantain. 

 Alisma peantago aquatica Iv. 4. Water plantain. In 

 ponds uear Oswego; infrequent. May to August; flowers white, 

 small. 



SagitTARIA L. Arrowhead. 

 Sagittaria ARiFOtlA Nutt. 4. Aruui leaved arrowhead. 

 {S. CH/!ea/c7 ShtMoUyas to the deep water form.) Margins of 

 ponds, Swan island, Suavie's island, Bridgeton, Oak Grove, etc. 

 July, August; white. 



'' wSagiTTaria LATiFOETA Willd. 4. Wapato. {S. esculenta 

 of Howell's Flora.)' In ponds. Mocks bottom and near Oak 

 Grove. This species formerly grew sj^aiingly in the slough on 

 Ea.st Morrison and East Stark streets, but disappeared there 

 when the present fills were niade. ' It grows abundantly in shal- 

 low lakes, pcnds, sloughs and low-lying river shores from British 

 Columbia to California, and prior to the advent of the white 

 man its tubers constituted a source of vegetable food for the 

 norihwest Indians second only to the Camas. The tubers were 

 gathered by the klooches, frequently in April, but usually in 

 October, and unlike the Camas could be kept in the taw state 

 for two or three months or more. They wese cooked in three 

 or four different wa\s. i. Steaming. When the tribe lived close 

 to the ocean, a platform of stones was heated and covered with 



