Rose Family 199 



the middle ; cauline leaves smaller and with fewer leaflets ; flowers 

 about 15 mm. broad, in rather narrow cymes; pedicels slender; 

 bractlets oblong, about % as long as the ovate calyx-lobes ; petals 

 broadly obcordate, about % longer than the calyx-lobes; style 

 filiform. 



Ballona, Basse. Apparently a rare plant not otherwise known. 



5. ARGENTINA Lam. 



Perennial herbs growing in damp ground and spread- 

 ing by slender runners, with thick and fascicled roots 

 and pinnate leaves. Flowers borne on simple pedicels 

 from the axils of the leaves formed on the runners, 

 5-merous and with 5 bractlets. Calyx nearly wheel- 

 shaped. Petals yellow, broadly elliptic to nearly orbicu- 

 lar, obtuse. Stamens 20-25, inserted closely around the 

 base of the receptacle ; filaments filiform, rather short. 

 Receptacle hemispheric, bearing numerous pistils, these 

 becoming dry achenes in fruit. Style filiform, lateral, 

 attached at the middle of the ovary, somewhat persist- 

 ent. Seeds ascending and amphitropous. 



1. A. Anserina (L.) Rydb. Main stem inconspicuous, pro- 

 ducing many long runners ; leaves 1-2 dm. long, abruptly pinnate 

 with 9-31 larger leaflets and with smaller ones interposed, usually 

 prostrate, slightly silky and green above, white-silky and tomen- 

 tose beneath; larger leaflets oblanceolate, 1-3 cm. long, deeply 

 and sharply serrate; flowers 1-2 cm. broad, on pedicels 3-20 cm. 

 long ; petals much exceeding the calyx. 



Rather common in damp ground in the valleys. Flowering through the 

 summer. (Potentilla Anserina L.) 



6. DBYMOCALLIS Tourr. 



Erect more or less glandular or viscid herbs from 

 perennial rootstocks, with pinnate leaves and cymose 

 yellow 5-merous bracteolate flowers. Calyx saucer- 

 shaped or hemispheric. Petals obovate, elliptic or nearly 

 orbicular, obtuse. Stamens 20-30 on a persistent disk 



