194 American Midland Naturalist Monograph No. 2 



1. Flowers capitate, with an involucre; stone ellipsoid. 



9. Tree; dry woods, local; more common southw. Apr.-May \Cynoxylon 



floridum (L.) Raf.} Flowering Dogwood C. florida L. 



9. Herb or subshrub; woods, n. 111., known from Lake, Cook, Ogle, and La 

 Salle counties. May-June. [Chamaeper'icltmenum canadense (L.) 

 Aschers. & Graebn.] Bunchberry C. canadensis L. 



2. Nyssa L. — Tupelo 



L Leaves entire; pistillate flowers 2-several together; fruit ovoid, 8-12 mm. 

 long; rich soil, chiefly s. and s e. 111., but also in Cook and Kankakee 

 counties. May. Most of the specimens examined belong, apparently, to 

 the var. carolimana (Poir.) Fern. Black Gum N. sylvatica Marsh. 



1. Leaves more or less dentate with 1 or more large angular teeth, or entire; 

 pistillate flower solitary; fruit ellipsoid, 1.5-3 cm. long; swamps and low 

 woods, s. 111., northw. to Crawford Co. Tupelo Gum N. aquatica L. 



118. Araliaceae Vent. — Ginseng Family 



1 . Leaves alternate; carpels 5; fruit black 1. Aralia 



I. Leaves usually three in a whorl; carpels 2 or 3 ; fruit red or yellowish 2. Panax 



1. Aralia L. 



1. Shrub or small tree, prickly; woods, s. 111. July-Aug. Hercules'-club 



A. spmosa L. 



1. Herbs. 



2. Umbels numerous; woods, local. July-Aug. American Spikenard -... 



A. racemosa L. 



2. Umbels 2-7. 



3. Plant leafy-stemmed, prickly or bristly; woods, rare. June-July. Bristly 



Aralia A. hispida Vent. 



3. Plant acaulescent, not bristly; moist ground in woods, chiefly in the n. 

 half of the state. May-June. Wild Sarsaparilla A. midicaulis L. 



2. Panax L. — Ginseng 



1. Leaflets sessile, obtuse; berry yellow; rhizome globose; woods; May-June. 

 Not definitely known to occur in III., but to be expected in this state 

 since it has been collected in n.w. Ind. Dwarf Ginseng P. trijoliiim L. 



1. Leaflets petiolulate, acuminate; berry red; rhizome fusiform; rich woods. 

 July-Aug. Ginseng P. qianqnefolium L. 



119. Umbelliferae B. Ju.ss. — Parsley Fainily 



1. Leaves simple, rigid, parallel-veined, remotely bristly on the margins; inflorescence 



capitate 1. Ervngiiim 



1 . Leaves compound; inflorescence umbellate. 



2. Ovary and fruit with straight or curved bristles or prickles. 



3. Ovary and fruit with straight bristles; fruit much longer than wide; leaves ter- 

 nately decompound with lanceolate or ovate, toothed leaflets; flowers (in our 

 species) white; roots aromatic 5. Osmorniza 



