ANALYTICAL KEY 17 



Goldthread, COPTIS TRIFOLIA (p. 63). 

 f. Flowers epigynous. 

 g. Leaves simple; ovary not two-celled. 

 h. Leaves oblong; stem erect; calyx 5-lobed; ovary i-celled. 



Bastard Toadflax, COMAITDRA XJMBELLATA (p. 54), 

 li. Leaves kidney-shaped; aerial stem wanting; calyx 3— lobed; ovary 

 6-celled. Wild Ginger, ASARXJM CANADENSE (p. 55). 



g. Leaves Cbmpound, ovary two-celled; flowers in umbels iUmbelUferae), 

 h. Flowers yellow. 

 i. Leaflets rounded. TAENIDIA INTEGERRIMA (p. 99). 



i. Leaflets pointed. ZIZIA ATTREA (p. 99). 



h. Flowers white. 

 i. Annual; stem low (1.5—5 dm.); foliage light green; fruit narrowly 

 oblong. CHAEROFHYLLTJM PROGTJMBEKS (p. 98). 



i. Perennials. 

 j. Stem low (1—2.5 dm.), arising from a. corm; plant glabrous; flowers 

 appearing in earliest spring, the red-brown stamens contrasting 

 with the white petals. 



Harbinger-of-spring, ERIGENIA BTJLBOSA (p. 98), 



j. Plants of medium to tall stature (3 dm. or higher), not arising 



from corms; flowers appearing in middle or late spring; stamens 



not red-brown. 



k. Leaves 3-f oliolate ; leaflets large, ovate, doubly serrate ; plants 



with unpleasant odor when bruised. , 



HoNEwoRT, CRYPTOTAENIA CANADENSIS (p. 99). 

 k. Leaves ternately decompound. 

 1. Coarse pl^nt, 1-3 m. tall, pubescent; umbels large (more than 

 10 cm. in diameter); fruit obovate, nearly as hroad as long. 



Cow Parsnip, HERACLETTM LANATUM (p. 99). 

 1. Plant of medium size, 3-12 dm. in height; umbels small (less 

 than 5 cm. in diameter) ; fruit slender, much elongated {Sweet 

 .cicely).. : 

 m. Plan,t gla.brous; root very aromatic; styles 2 mm. or more 

 in length.. OSMORHIZA LONGISTYLIS (p. 98). 



m. Plant pubescent; root not very aromatic; styles not exceeding 

 I mm. in length. OSMORHIZA CLAYTONI (p. 98). 



e. Both calyx and corolla present (except in some Compositae, whose 

 flowers are in dense heads) . 

 f. Corolla polypetalous or nearly so (p. 24). 

 ff. Flowers hypogynous 01* perigynous (p. 23). 

 h. .petals similar, Jeaf-Hke without tubular modiflcations (p. 22). 

 i. Pistils more than one, the carpels, however, often being more or less 

 united (p. 19). 

 j. Flowers strictly hypogynous (stamens inserted on receptacle), (p. 18.) 

 k. Pistils united; stamens ten {Geranium). 

 1. Perennial; petals more than i cm. long. 



GERANIUM MACULATTTM (p. 86). 

 1. Annual or biennial; petals less than i cm. long. 



GERANIUM CAROLINIANUM (p. 86). 

 k. Pistils separate: stamens more than ten (Ranunculaceae), 

 1. Pistils with but one ovule. 



SPRING PLORA 2 



