88 CAHYOPHYLLACEAE 



1. V. vulgaris Host. Cow Herb. A smooth annual, l°-3° high with 

 ovater lanceolate leaves and rather small reddish flowers in loose cymes. — - 

 Occurs occasionally in waste places, especially alOBg railroads at Sheffield. 

 June. 



6. ALSINE L. 



Diffuse annuals. Stamens 10 or less. Styles usually three. Pod 1- 

 celled, several-many-ovuled, and usually 6-valved. 



1. A. media L. Chickweed. Stems spreading, hairy : leaves 

 ovate, the lower long-petioled : flowers axillary or terminal, slender- 

 pedicelled : petals shorter than sepals. — Locally well adventized in 

 gardens in Kansas City and Independence. May-October. 



7. CBRASTITJM L. Chickweed. 

 Flowers cymose. Stamens 10 or less. Pod 1-celled, many-ovuled, 10- 

 valved. 



Petals not longer than sepals. 1. C. vulgatum. 

 Petals longer than sepals. 



Pedicels 3-7 times as long as calyx. 2. C. longipedvnculatum. 



Pedicels 1-2 times as long as calyx. 3. C. irachypodum. 



1. C. vulgatum L. Annual, 4'-12'' long, spreading, hairy : leaves ob- 

 long : pedicels longer than calyx. — Common in woods and fields. April- 

 June. 



2. C. longipedunculatum Muhl. Annual, 6'-30' high, erect or as- 

 cending, more or less clammy-pubescent : leaves oblong-lanceolate, l''-2' 

 long : cyme open, many-flowered. — Abundant in moist woods. April- 

 June. 



3. C. brachypodum Engelm. Like the last but usually smaller: 

 leaves 3'''-12''' long: cymes more compact. — Common in barrens and 

 rocky prairies throughout the southern part. April-June. 



8. ARENARIA L. 



Flowers terminal, cymose. Stamens 10. Styles 3. Ovary 1 -celled, 

 many-ovuled, opening by 3 valves. Seeds without an appendage at the 

 hilum. 



1. A. patula Miohx. Sandwort. Annual, diffusely branching: 

 leaves linear-filiform : petals white: sepals 3-5-nerved. — In barrens near 

 Independence and at Greenwood. Locally abundant. May-June. 



9. MOEHRINGIA L. 



Cymes few-flowered. Stamens 10. Styles 3. Ovary few-ovuled. 

 Seeds with an appendage at the hilum. 



1. M. lateriflora (L.) Fenzl. Sandwort. Erect, pnberulent, 1° or 

 less high : leaves oval or oblong, obtuse : cymes 1-4-flowered, soon ap- 

 pearing lateral. — In wet rooky woods between Lee's Summit and Little 

 Blue Tank, fide Rev. Cameron Mann. May. 



