176 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



3, Geum canadense Jacq. 



Borders of woods; commou. June-July. Eastern U. S. (G. album Gme\.) 



4. Geum meyerianum Rydb. 



Moist ground; infrequent. July-Aug. Northern states, south to Md. 



6. Geum hirsutum Muhl. 

 Woods and banks; rare; Seven Locks (Steele). July. Conn, to Ga. 



6. Geum strictum Ait. 

 Low meadows; frequent. June. Northern states, south to Md. 



10. POTENTILLA I>. Five-finger. 



Leaves pinnately compound 6. P. anserina. 



lieaves palmately compound. 

 Flowers solitary on long axillary peduncles. Plants with prostrate shoots or run- 

 ners. 

 Earliest flower from the node above the first well-developed internode. 



1. P. pumila. 

 Earliest flower from the node above the second or third well-developed internode. 



2. P. canadensis. 

 Flowers in cymes. 



Leaflets 3 3. P. monspellensis. 



Leaflets 5-7. 



Leaflets green beneath 4. P. recta. 



Leaflets silvery beneath 5. P. argentea. 



1. Potentilla pumila Poir. 



Dry ground and old fields; frequent. May. Me. to Md. (P. canadensis oi\Vavd's 



Flora.) 



2. Potentilla canadensis L. Five-finger. 

 • Open ground; frequent. May. Eastern U. S. (P. canadensis simplex of Ward's 

 Flora.) 



3. Potentilla monspellensis L. 



Moist open ground; frequent. July. Nearly throughout N. Amer.; also in Eur. 

 (P. norvegica L.) 



4. Potentilla recta L. 



Fields; rare. June. Northern states, south to Md.; adventive from Ear. 



5. Potentilla argentea L. 



Barren places; rare. June. Northern states, south to Md. 



6. Potentilla anserina L. - Silver-weed. 

 Moist open ground; rare. Northern states, south to IMd. (Argentina anserina 



Rydb.) 



11. AGRIMONIA L. Agrimony. 



Axis of racemes villous. Fruit 6 mm. wide; root not thickened — 1. A. gryposepala. 

 Axis of racemes appressed-pubescent and often glandular, but not villous. 

 Leaflets glabrous beneath or with a few scattered spreading hairs; fruiting calyx 



hemispheric 2. A. rostellata. 



Leaflets pubescent beneath; fruiting calyx topshaped. 



Leaflets narrowly lanceolate, the principal ones 9-13 or more; root not tuberous. 



3. A. parviflora. 

 Leaflets oblong or elliptic, mostly 5-7; root tuberous-thickened..*. A. pubescens. 



1. Agrimonia gryposepala Wallr. 



Dry woods; infrequent. Aug. Northern states, south to Va. (^4. hirsuta Bicknell.) 



2. Agrimonia rostellata Wallr. 



Rocky woods; frequent. Aug. Conn, to Ga. (J. fif^wio/'/a of Ward's Flora.) 



