126 PROCEEDINGS OF THE AMERICAN ACADEMY 



i- 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 IL ALSINE^. 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. POLYCARPE^. Sepals free or somewhat united 

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

 together with the stamens upon an hypogynous or slightly perigynous 

 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-margiued. 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. 

 -1- 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. 



M- 1- Cauline leaves setaceous. 



17, Lceflingia. 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. 



•t- 4- H- Leaves forming a radical rosette; tlie 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 ovatC' 

 globose, 3-valved, many-seeded. 



