142 THE CARNATION FAMILY. 



Section 1.— FI-OWEES INVARIABLY WHITE. 

 A. — Sepals united into a bag-like calyx. 

 Flowers bisexual ; styles three. Calyx remarkably in- 

 flated, smooth, whitish, beautifully vemed with 



purple and green ; whole plant glaucous 1. Bladder Camfion. 



Flowers unisexual ; styles five. Stems stout, rather 



downy ; leaves egg-shaped 5. "White Lychnis. 



B. — Sepals separate, or only very slightly united at the base. 



* Leaves thread-shaped, cylindrical. 

 Sepals and petals usually four eacli, rarely five ; stamens 

 four, rarely ten. 



Plant prostrate, glabrous, perennial IS. Common Pearl- weed. 



Plant erect, shghtly hairy, annual 10. Annual Peakl-weed. ' 



Sepals and petals usually five each ; stamens five to ten. 

 Petals shorter than the calyx. Plant six to eight 



inches high 20. Corn Spurrey. 



Petals twice as long as the calyx 21. Dwarf Spurrey. 



** Leaves flat, lanceolate or egg-shaped. 

 Petals not in the least diNided. 

 Parts of the flower in fours ; flower usually solitary . . 17. Mcench's Flower. 

 Parts of the flower in fives ; flowers numerous. 



Leaves petiolate, three-ribbed 22. False Chickweed. 



Leaves sessile, without ribs. Plant stiff and 1 24. Thyme leaved Sand- 



shrub-like i wort. 



Petals more or less deeply cleft. 

 Styles three. 



Leaves egg-shaped or heart-shaped ; lower ones 

 on stalks. 



Petals shorter than the calyx 11 . Chickweed. 



_, , . , f 0. BnoAD leaved Wood 



Petals twice as long as the calyx ^ Stitchwort. 



Leaves linear or lanceolate, sessile. 



Plant growing in wet ditches, annual, trailing. . 10. Boo Stitchwort. 

 Plant growing in dry places, perennial, upright. 



Petals not longer than the calyx 8. Smalt. Stitchwort. 



Petals twice as long as the calyx 7. Satin-i'Lower. 



Styles five ; plant hairy, and often clammy. 



o. Petals twice as long as the calyx ; leaves naiTow- 



lanceolatc 10. Field Moitse-ear. 



b. Petals half as long again as the calyx ; leaves 



heart-shaped, sessile 12. Water Motisk-ear. 



c. Petals shorter than I he calyx, or about as long. 



Leaves broadly egg-shnped, almost round 13. Common Mouse-ear. 



Leaves long and narrow. 



Stamens usually five lb. Least Mouse- ear. 



Stamens usuallv ton 14. Sticky Mouse-ear, 



