14 ANALYTICAL KEY 



n. Flowers appearing before the leaves; the same root producit 

 several to many shoots. 



Sand Cherry, PKTTNXTS PTTMILA (p. So 

 1. Stamens more than twenty; carpels two to five. 

 m. Leaves palmately veined. 



Nine-bark, PHYSOCARPTTS OPTJLIFOLITTS (p. 76 

 m. Leaves pinnately veined, 

 n. Flowers cymose. Chokeberry, PYBTTS ABBUTIFOLIA (p. ^^ 

 u. Flowers racemose. 



Serviceberry, AMELANCHIEB CANADENSIS (p. -jy 

 a. HEBBS. \it^%T 

 b. Fern-like or rush-like plants without seeds or true flowers. 

 €• bpores borne on brownish stems, the green organs borne on separate stem 

 appearing later. Field Horsetail, EQUISETITM ABVENSE (p. 30 



c. Spores and foliage organs not borne on separate stems (Osmunda). 

 d. Spores borne on separate leaves, which arise from the same stem as tl 

 green leaves. Cinnamon Fern, OSMUNDA GINNAMOMEA (p. 29 



d. Spores borne on special portions of leaves which otherwise are green, 

 e. Spore-bearing portion terminal. 



Royal Fern, OSMTTNDA BEGALIS (p. 29 

 e. Spore-bearing portion median. 



Interrupted Fern, OSMTTNDA CLAYTONIANA (p. 29 

 (^^. Plants with true flowers and seeds. 



c. Stems with vascular bundles sca£^^^^y|^lllj§ll|y throughout (as seen 

 cross section) without a vascular ring between two areas without bundle 

 viz., the pith and bark; leaves unless long and narrow with two or mo 

 primary veins (except in Symplocarpus) , which are approximately {^r^^lL 

 or at least not divergent above (except in Trillium and Arisaemd) ; small 

 veins not conspicuously reticulated (except in Trillium, Arisaema, and Sy^ 

 plocarpus); floral parts in threes or sixes (except in Maianthemum ai 

 Symplocarpus, where they are in fours, in Arisaema, where the perian 

 is wanting, and jn Sparganium, where the perianth number varies 

 (M onocotyledons.) (p. 16.) 

 d. Flowers in dense heads or spikes; perianth inconspicuous. 

 o. Flowers in heads* not enclosed in a spathe. 



Bur Reed, SPABGANITTM ETTBYCABPTTM (p, 32 

 o. Flowers in spike (spadix; ; if in head, enclosed in a spathe. (Araceae 

 t. Spadix freely exposed, not enclosed in a spathe. 



Sweet Flag, ACOBTTS CALAMUS (p. 34 

 f. Spadix enclosed in a spathe. 

 g. Spadix cylindric or club-shaped, the upper portion flowerless; flow* 

 imperfect, appearing with the leaves. 



Jack-in-the-Pulpit, ABISAEMA TBIPHYLLUM (p. 3; 

 g. Spadix globose, flower-bearing to the summit; flowers perfect, appeari; 

 before the leaves. 



Skunk Cabbage, SYMPLOCABPTTS POETIDTTS (p. 3; 

 d. Flowers not in dense beads or spikes; perianth commonly showy. 

 e. Floral parts in fours. 



Wild Lily-of-the-valley, MAIANTHEMTTM CANADENSE (p. 3; 

 e. Floral parts in threes or sixes. 

 f. Perianth distinctly differentiated in color into a calyx and corolla (p. i^ 

 g. Leaves linear to lanceolate, not whorled. 



Spiderwort, TBADESCANTIA VIEGINICA (p. 3^ 



