CHICKENWEED FAMILY 85 



Sepals narrowly lanceolate, acuminate. 

 Cymes open, not densely congested. 

 Plant more or less glandular. 



Branches of the inflorescence long and ascending-spreading; sepals 



equalling or exceeding the petals. 19. A. laxiflora. 



Branches of the inflorescence comparatively short and strongly ascend- 

 ing; sepals usually shorter than the petals. 20. A. Fendleri. 

 Plant perfectly glabrous. 21. A. Eastwoodiae. 



Cymes densely congested, subcapitate. 



Caudex of numerous procumbent branches covered with dried leaves; 



sepals long-acuminate, longer than the petals. 22. A. Franklinii. 

 Caudex multicipital; sepals short-acuminate, shorter than the petals. 



23. A. Hookeri. 



7. SAGINA L. Pearlwort. 



stem short, forming sterile rosettes at the base; perennials. 



Basal leaves filiform; petals shorter than the green sepals. 1. S. saginoides. 



Basal leaves subulate; petals longer than the purple-tinged sepals. 2. S. nivalis. 

 Stem slender, 5-10 cm. high, without sterile rosettes at the base; annuals. 



3. S. occidentalis. 



8. SPERGULA L. Spurry, Corn Spurry. l. S. arvensis. 



9. TISSA Adans. Sand Spurry. 



Stipules lanceolate or ovate-lanceolate, longer than broad. 1. T. rubra. 



Stipules broadly triangular, as broad as long or broader. 



Stipules triangular, about as long as broad; iuternodes of the stem much shorter than 



the leaves; seeds rough. 2. T. salina. 



Stipules very broadly triangular, almost twice as broad as long; middle internodes 

 about equalling the nodes ; seeds smooth. 3. T. sparsiflora. 



10. LOEFLINGIA L. l. L. texana. 



Family 45. CARYOPHYLLACEAE. Pink Family. 



Calyx with at least twice as many ribs (usually 10) as calyx-teeth, running both into the 

 teeth and the sinuses. 

 Styles 5, alternate with the foliaceous calyx-lobes. 1. Agrostemma. 



Styles either 5 and opposite the short calyx-lobes or fewer than 5. 



Styles mostly 3; capsule usually septate at the base. 2. Silene. 



Styles 5; capsule 1-celled to the base. 3. Wahlbergell.\. 



Calyx 5-angled or 5-ribbed. 



Petals with a crown; calyx not strongly angled. 4. Saponaria. 



Petals without a crown; calyx strongly 5-angled. 5. Vaccaria. 



1. AGROSTEMMA L. Corn Cockle, Corn Campion. i. A. Githago. 



2. SILENE L. Catchfly, Campion. 



Annuals. 



Glabrous or nearly so, or the upper nodes glutmous. 1. S. antirrhina. 



Viscid-pubescent or hirsute throughout. 2. S. noctiflora. 



Perennials. 



Calyx mostly 10-nerved, rarely strongly inflated in fruit, not constricted at the 

 mouth. 

 Caulescent herbs, rather tall, not densely matted, with rootstocks. 



Inflorescence paniculate or thyrsoid at the end of the stem, not leafy; flowers 

 more than I cm. long. 

 Blade of the petals 2-parted and cleft into 4-6 linear segments. 



3. S. oregana. 

 Blades of the petals bifid ; each lobe sometimes with a lateral tooth. 



Blade small, scarcely exceeding the small appendages; plant viscid- 

 tomentose. 4. S. Spaldingii. 



Blades conspicuous, much longer than the appendages; plant viscid- 

 puberulent or glabrous. 

 Stipe of the capsule over 5 mm. long; fruiting calyx distinctly con- 

 tracted below. 5. S. repens. 

 Stipe of the capsule short, less than 5 mm. long; calyx slightly if 

 at all contracted below. 

 Plants comparatively few-flowered; inflorescence not verticil- 

 lately racemose or spicate; branches mostly ascending 

 and bracts shorter than the calyx. 

 Stemnearly glabrous; flowers solitary or 3-5 in an open cyme; 



leaves grass-like. 6. S. monantha. 



Stem puberulent throughout or viscid above ; leaves not grass- 

 like. 

 Calyx short, its lobes rounded, with dilated scarious mar- 

 gins. 7. S. Columbiana. 

 Calyx long, its lobes ovate; margins scarcely dilated. 



Calyx inflated in fruit, purple-veined; stem viscid 

 above. 



