126 PROCEEDINGS OF THE AMERICAN ACADEMY 



,_ .*_ h_ <_ Styles 5, opposite the petals : calyx teeth conspicuously prolonged 



into foliaceous appendages. 



7 Agrostemma. Calyx ovoid, with 10 strong ribs; the elon- 

 gated teeth in our introduced species an inch or more in length, 

 exceeding the 5 large unappendaged petals. Stamens 10. Capsule 

 1 -celled. Leaves linear. 



Tribe II. ALSINEiE. Sepals free or nearly so. Petals not 

 distinctly unguiculate, never appendaged. Styles 2-5, distinct to the 

 base. — Including genera 8-14 ; to be published at an early date. 



Tribe III. POLYCARPEiE. Sepals free or somewhat united 

 at the base. Petals commonly small, not distinctly unguiculate, borne 

 together with the stamens upon an hypogynous or slightly pengynous 

 disk. Style simple below, 3- or more rarely 2-branched above. The 

 stigmas rarely sessile on the ovary. 



* Petals 2-5-parted. 



15 Drymaria. Sepals 5, often scarious-margined. Petals 5. 



Stamens 3-5, slightly perigynous. Ovary 1-celled, several-many- 



ovuled. Capsule 3-valved. Flowers small, greenish white. Leaves 



flat, though often narrow, opposite or pseudoverticellate. Stipules 



small, free, scarious or bristle-formed, sometimes fugacious. 



* * Petals entire, denticulate, or none. 



•*- Cauline leaves numerous, flat, not linear-setaceous. 



16. Polycarpon. Sepals 5, more or less carinate, entire, scari- 

 ous-margined. Petals 5, small, shorter than the sepals, sometimes 

 emarginate. Stamens 3-5. Ovary 1-celled. Capsule 3-valved, sev- 

 eral-seeded. Seeds ovoid with the embryo but little curved. 



*- — Cauline leaves setaceous. 



17. Lcefiingia. Sepals* 5, carinate and produced to rather rigid 

 setaceous tips ; the three outer ones commonly bearing a setaceous 

 tooth on each side. Petals 3-5, small or none. Stamens 3(-5 ?). 

 Ovary 1-celled, several-seeded, triangular. Capsule 3-valved. Seeds 

 oblong, attached laterally near the base. Embryo somewhat curved. 

 Cotyledons accumbent. 



.,_ 4_ 4_ Leaves forming a radical rosette; the cauline minute or obsolete.- 



basal stipules lacerate. 



18. Stipulicida. Sepals 5, distinct, somewhat rigid, obtuse, 

 emarginate, scarious-margined. Petals 5, entire, narrowly oblong, 

 gradually contracted below, hypogynous. Stamens 5. Capsule ovate- 

 globose, 3-valved, many-seeded. 



