24 ANALYTICAL KEY 



i. Styles and carpels two (Umbelliferae). 

 j. Petals yellow. 



k. Leaflets serrate. ZIZIA AUREA (p. 99)- 



k. Leaflets entire. TAENIDIA INTEGERRIMA (p. 99)- 



j. Petals white. 



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

 oblong. CHAEROPHYLLTJM PROCUMBENS (p. 98). 



k. Perennials. 



1. Stem low (12.5 dm.), arising from a corm; plant glabrous; 

 flowers appearing in earliest spring, the red-brown anthers con- 

 trasting with the white petals. 



HARBINGER-OF-SPRING, ERIGENIA BTJLBOSA (p. 98). 

 1. 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. 



m. Leaves 3-foliolate; leaflets large, ovate, doubly serrate; plants 

 with unpleasant odor when bruised. 



HONEWORT, CRYPTOTAENIA CANADENSIS (p. 99). 

 m. Leaves ternately decompound. 



n. Coarse plant, 13 m. tall, pubescent; umbels large (more than 



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



Cow PARSNIP, HERACLETJM LANATTTM (p. 99). 



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



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



cicely). 



o. Plant glabrous; root very aromatic; styles 2 mm. or more 



in length. OSMORHIZA LONGISTYLIS (p. 98). 



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



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



f. Corolla sympetalous. 



g. Flowers hypogynous or perigynous (p. 28). 



h. Corolla regular or nearly so, divisions similar size and shape (p. 26). 

 i. Leaves compound. 

 j. Leaves 3-foliolate. 

 k. Marsh plants with white flowers; corolla bearded. 



BUCKBEAN, MENYANTHES TRIFOLIATA (p. 107). 

 k. Upland plants with pink to purple or yellow flowers (Oxalis). 

 1. Flowe'rs yellow. 



LADY'S SORREL, OXALIS STRICT A and 0. CORNICULATA (p. 85). 

 1. Flowers pink to purple. 



VIOLET WOOD SORREL, OXALIS VIOLACEA (p. 85). 

 j. Leaves pinnate; ovary three-celled. 



POLEMONIUM REPTANS (p. 108). 

 i. Leaves simple, though sometimes lobed or divided. 

 j. Leaves leathery, evergreen; flowers appearing before the new leaves. 

 TRAILING ARBUTUS, EPIGAEA REPENS (p. 103). 



J. Leaves not leathery; flowers appearing with or after the new leaves. 

 k. Leaves all radical (p. 25). 

 !. Flowers in dense, elongated spikes; stamens and parts of calyx 



and corolla in fours (Plantain). 



m. Plant of woodland brooks and ravines, with smooth, heart- 

 shaped or round-ovate leaves. 



PLANTAGO CORDATA (p. 116). 



