CARTOPHTLLACE^. (PINK FAMILY.) 61 



4. C. oblongifolium, Torr. Stems ascending, villous (6 - 12' high), 

 many-flowered ; leaves Mong-lanceolate and ovate ; peduncles clammj -haii-y ; pet- 

 als (2-lobed) and ripe pods about twice the length of the calyx. Ij. — Ebcky places, 

 New Tork and Pennsylvania ; rare. May. — Stouter and larger-flowered than 

 the following species. 



5. C. arvense, L. (Field Chickweed.) Stems ascending or erect, 

 tufted, downy, slender (4' -8' high), naked and few flowered at the summit; 

 leaves linear ; petals obcordate, more than twice the length of the calyx ; podi 

 scarcely longer than the calyx. % — Diy or rocky places. Northeastern States, 

 and northward, where it is indigenous. May, June. (Eu.) 



§ 2. MCENCHIA, Ehrhart. — Petals entire or merely retuse ; parts of the flower 

 commonly in fours : pod ovate, not longer than the calyx. 



6. C QUATEKNiiLLnM, Fenzl. Smooth and glaucous ; stem simple, erect 

 {21 -i' high), 1 -2-flowered; leaves lanceolate, acute ; petals not exceeding tha 

 calyx ; stamens 4. ® (Sagina erecta, L. Moenchia quatemella, Ehrhart 

 M. erecta. Smith.) — Near Baltimore, in dry ground. (Adv. from Eu.) 



13. SAO I IV A, L. Peablwokt. 



Sepals 4 or 5. Petals 4 or 5, undivided, often obsolete or none. Stamens as 

 many as the sepals, rarely twice their number. Styles as many as the sepals 

 and alternate with them. Pod many-seeded, 4 - 5-valved ; the valves opposite 

 the sepals. Seeds smooth. — Little, matted herbs, with thread-like or awl-shaped 

 leaves, and small flowers. (Name from sagina, fattening; of no obvious appli- 

 cation to these minute weeds.) 



^ Parts of the flower all in fours, or sometimes in fives. 



1. S. procumltcns, L. Perennial, depressed ; leaves threadform ornar- 

 rowly linear; peduncles ascending in fruit; stamens 4-5 ; petals shorter than the 

 broadly ovate sepals, sometimes none. — Springy places, Maine to Pennsylvania. 

 May -Aug. (Eu.) 



2. S. APti ALA, L. Annual, erect ; leaves almost bristle form ; stamens 4 ; pet- 

 als obsolete or none. — Sandy fields. New York to Penn. ; rare. (Adv. from Eu.) 



* * Sepals, petals, styles, and valves 5 : stamens 10. 



3. S. nodosa, Fenzl. Perennial, tufted; stems ascending (3' -5' high), 

 branching; leaves thread-form, the upper short and awl-shaped, with minute 

 ones fascicled in their axils so that the branchlets appear knotty ; petals much 

 longer than the calyx. (Spergnla nodosa, L.) — Wet sandy soil. Isle of Shoals, 

 N. Hampshire (Oakes ^ Bobbins), shore of Lake Superior, and northward. 

 July. (Eu.) 



S. Elli6ttii, Fenzl (Spergula decumbeus. Ell.) may occur in S. Virginia. 



SuBOKDBK m. IliliECEBREjE. The Knotwokt Family. 



14. SPEROIJliARIA, Pers. Spurrey-Sandwobt. 

 Sepals 5. Petals 5, entire. Stamens 2- 10. Styles and valves of the many- 

 seeded pod 3-5, when 5 the valves alternate with the sepals ! Embryo not 



