16 ANALYTICAL KEY 



j. Flowers in racemes; pedicels elongated; perianth segments 4-5 mm. 

 long; stamens included; leaves glabrous. 



SMILACINA STELLATA (p. 37). 



h. Flowers pink. WILD GARLIC, ALLIUM CANADENSE (p. 35). 



h. Flowers blue. WILD HYACINTH, CAMASSIA ESCULENTA (p. 36). 

 g. Flowers epigynous. 



h, Flowers yellow. YELLOW-EYED GRASS, HYPOXIS HIRSUTA (p. 41). 

 h. Flowers blue or white (Iris family). 



i. Stigmas petal-like. BLUE FLAG, IRIS VERSICOLOR (p. 41). 



i. Stigmas thread-like. 



BLUE-EYED GRASS, SISYRINCHIUM ANGUSTIFOLIITM (p. 41). 



C. Stems commonly with a vascular ring between two areas without vascular 



bundles, viz., the pith and bark; leaves with but one primary vein or with 



two or more strongly divergent primary veins; smaller veins commonly 



conspicuously reticulated (Dicotyledons). 



d. Perianth none, though the corolla-like involucre may readily be mistaken 

 for a perianth; stems with milky juice and crowded linear leaves. 



CYPRESS SPURGE, EUPHORBIA CYPARISSIAS (p. 88). 

 d. Perianth present; stems never with both milky juice and crowded linear 



leaves. 

 6. Only one perianth whorl present (usually arbitrarily called the calyx, 



except in the Umbelliferae) ; flowers not in dense heads (p. 17). 

 f. Flowers hypogynous (p. 17). 

 g. Pistil one. 

 h. Flowers dioecious: stems with sheathing stipules. 



FIELD SORREL, RTJMEX ACETOSELLA (p. 55). 

 h. Flowers perfect; stipules wanting. 



PEPPERGRASS, LEPIDIUM APETALTTM (p. 71). 

 g. Pistils more than one; stipules if present not sheathing the stem 



(Ranunculaceae) . 

 h. Flowers dioecious. 



EARLY MEADOW RUE, THALICTRTTM DIOICTJM (p. 60). 

 h. Flowers perfect. 



i. Ovaries with but one ovule; involucre present. 

 j. Leaves compound. 

 k. Roots tuberous; flowers several in an umbel. 



RUE ANEMONE, ANEMONELLA THALICTROIDES (p. 61). 

 k. Roots filamentous; flower single. 



WOOD ANEMONE, ANEMONE QTJINQUEFOLIA (p. 62). 

 j. Leaves simple. 

 k. Flowers appearing before the leaves of the season (old leaves 



persisting over winter); leaves three-lobed (Hepatica). 

 1. Leaf lobes rounded. HEPATICA TRILOBA (p. 61). 



1. Leaf lobes pointed. HEPATICA ACTJTILOBA (p. 61). 



k. Flowers appearing after the leaves; leaves cleft. 



ANEMONE CANADENSIS (p. 62). 



i. Ovaries with two or more ovules; involucre wanting. 

 j. Flowers yellow; leaves simple. 



MARSH MARIGOLD, CALTHA PALTTSTRIS (p. 62). 

 j. Flowers white. 



k. Leaves decompound. ISOPYRTTM BITERNATTTM (p. 62). 



k. Leaves tri-foliolate. If the small club-shaped petals are overlooked, 

 there may be sought here 



