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, COMANDRA UMBELLATA (p. 54). 



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



6 -celled. WILD GINGER, ASARUM CANADENSE (p. 55)- 



g. Leaves compound, ovary two-celled; flowers in umbels (Umbelliferae). 



h. Flowers yellow. 



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



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



h. Flowers white. 



i. Annual; stem low (1.55 dm.); foliage light green; fruit narrowly 

 oblong. CHAEROPHYLLUM PROCUMBENS (p. 98). 



1. Perennials. 



j. Stem low (12.5 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 BULBOSA (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-foliolate; leaflets large, ovate, doubly serrate; plants 

 with unpleasant odor when bruised. 



HONEWORT, CRYPTOTAENIA CANADENSIS (p. 99). 

 k. Leaves ternately decompound. 



1. Coarse plant, 1-3 m. tall, pubescent; umbels large (more than 

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



Cow PARSNIP, HERACLETJM 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. Plant glabrous; 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). 



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



flowers are in dense heads). 

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

 g. Flowers hypogynous or perigynous (p. 23). 



h. Petals similar, leaf-like without tubular modifications (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 MACULATUM (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 FLORA 2 



