194 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



4. Polygala verticillata L. 



Dry soil, fields and meadows; frequent. July-Oct. Eastern N. Amer. 

 Our form has whitish flowers. 



5. Polygala ambigua Nutt. 



Dry fields and open ground ; frequent. July-Oct. Northern states, south to Ga. 

 Flowers almost always purplish in our form. 



6. Polygala cruciata L. 



Sandy swamps and bogs; infrequent; Powder Mill bogs; Brightwood; reported 

 also from Lakeland. July-Sept. Eastern U. S. 



7. Polygala viridescens L. 



Fields and open ground; frequent. June-Oct. Northern states, south to N. C. 

 (P. sanguined L. ; P. purpurea Nutt.) 



Tho greenish white and purplish forms were originally described as distinct species, 

 the name P. sanguinea being applied to the latter. 



8. Polygala curtissii A. Gray. 



Open woods or sandy fields, seemingly where the water table is high; apparently 

 confined to the Coastal Plain. July-Oct. Md. to Ga. 



This species was described from an abnormal form collected near Alexandria by 

 A. H. Curtiss. The normal form was given the varietal name pycnostachys by Gray 

 and published by Knowltoh. This is possibly the plant referred to by Brereton as 

 P. purpurea. 



9. Polygala mariana Mill. 



Sandy fields, Coastal Plain; frequent, July-Oct. Southern states, north to N. J. 

 (P. fastigiata Nutt. ) . 



10. Polygala nuttallii Torr. & Gray. 



Sandy soil on the Coastal Plain; infrequent. July-Sept. Eastern U. S. (P. 

 sanguinea Nutt.) 



11. Polygala incarnata L. 



Sandy fields and pine woods; frequent. July-Sept. Eastern U. S. 



Probably P. setacea of Brereton's Prodromus, as this is the only "aphyllos" plant 

 of the genus in this vicinity. 



Polygala pauci/olia Willd., the flowering wintorgreen or fringed polygala, is listed 

 in Brereton's Prodromus, but has not been reported since. It is a dainty plant with 

 1-4 handsome pink or rose-purple flowers, 1.4-2 cm. long, in the axils of the upper 

 leaves. 



90. EUPHORBIACEAE. Spurge Family. 



Juice not milky; flowers not in a calyx-like involucre. Annual plants; leaves 

 alternate. 

 Ovules 2 in each cell. Leaves entire, 2-ranked; flowers in small axillary clusters, 



apetalous; stamens 3 !. PHYLLANTHTJ S . 



Ovule 1 in each cell. 

 Pubescence scaly or of branched hairs; petals and stamens 5; stamens incurved 



in bud; ovary 1-celled 2. CROTONOPSIS. 



Pubescence neither scaly nor of branched hairs; flowers apetalous; si aniens erect 



in bud; ovary 3-celled 3. ACALYPHA. 



Juice milky; inflorescence (a cyathium) resembling a small perfect flower, consisting 

 of several staminate flowers, each composed of a single stamen, and a central 

 pistillate flower, all inclosed in a calyx-like involucre with 1-5 glands between 

 its 5 lobes. 



