24 ANALYTICAL KEY 



i.. Styles and carpels two iUmbelliferae). 

 j. Jfetals yellow'. 

 k. Leaflets serrate. ZIZIA ATTBEA (p. 99)* 



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



j. Petals white. 

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

 oblong. CHAEROPHYLLUM PROCUMBENS (p. 98). 



k. Perennials. 

 1. Stem low (i— 2.S dm.), arising from n. corm; plant glabrous; 

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

 trasting with the white petals. 



Harbin GER-OF-spRiNG, ERIGENIA BTILBOSA (p. 98). 



r. 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, 1—3 m. tall, pubescent; umbels large (more than 



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



Cow Parsnip, HERACLEUM LANATTJM (p. 99). 



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



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



' cicely). 



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

 in length; OSMORHIZA LONGISTYLIS (p. 98). 



0. 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). 

 k. 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 TRIFOXIATA (p. 107). 

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

 1. Flowers yellow. 



Lady's Sorrel, OXALIS STRICTA and 0. CORNICTJLATA (p. 85). 

 1, Flowers pink to purple. 



Violet Wood Sorrel, OXALIS YIOLACEA (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). 

 1. 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. 126). 



