16 SPRING FLORA OF MANHATTAN. 



21. CARYOPHYLLACEAE. 



Herbs with opposite, entire leaves. Stamens not more tlian twice the 

 sepals. Ovary 1-celled with central placenta. 



SILENE, L. 

 Calyx .5-toothed. Stamens 10. Styles 3. 



6' antirrhiiia, h. A slender annual with linear leaves and small 

 flowers on long peduncles, each of which is provided with a glutinous 

 ring. Dry ground, common. 



S. vulgaris, (Moench), Garke. Leaves ovate- lanceolate Calyx 

 inflated, veiny. Large petals 2-cleft. Escaped occasionally. 

 22. ANONACEAE. 

 Sepals 3. Petals 6. Stamens numerous. Pistils several. All 

 hypogynous. Woody plants. 



ASIMINA, Adans. 

 Pistils ripening into 1 or 2 oblong, yellow, pulpy fruits. 

 A. triloba, {L) DanaA. A small tree with oblanceolate leaves and 

 dark brownish-red flowers. Fruit edible. 



23. RANUNCULACEAE. 

 Parts of flower all free and distinct. Sepals often corolla-like. 

 Petals often absent. Stamens numerous. Pistils few to several, 1- 

 celled. Fruit an achene, follicle or berry. Herbs. 



Flowers dioecious, small, panicled TliaUctrum 



Flowers perfect. 



Not spurred. Fruit an achene. 



Petals absent Anemone 



Petals present. 



Achenes in a long spike Myosurus 



Achenes in a head Rammcidus 



Conspicuously spurred. Fruit a follicle. 



Spur one Delphinimn 



Spurs 5 Aquihi/ia 



THALICTRUM. L. 

 Petals none. Fruit an achene. 



T. pm-puvxaeens, L. Stem 1 m. high. Leaves decompound. Achenes 

 ribbed. Low ground, infrequent 



ANEMONE. L 

 Leaves radical; the stem leaves forming a 2-;> leaved involucre on 

 each peduncle. 



A. GaroUniana, Walt Stem 1-2 dm. high. Leaves cleft into rather 

 narrow divisions. Sepals several (10 15), white or purple. Prairie, 

 infrequent. 



^1 Canadevsis, L. Stem taller. Leaves larger, cleft into wedge- 

 shaped divisions. Sepals o, white. Low places, infrequent. 



MYOSURUS, L. 

 Sepals and petals .'>. IMstils on a conical receptacle which greatly 

 elongates in fruit. 



