170 American Midland Naturalist Monograph No. 7 



2. Nyssa L. — Tupelo 



1. Leaves entire; pistillate flowers 2-several together; fruit ovoid, 

 8-12 mm long; rich soil, s. 111., also in Cook and Kankakee 

 counties. May. Sour Gum. Black Gum [A^. mult i flora Wang.; 

 A'^. sylvatica var. caroliniana (Poir.) Fern.] 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., extending northward to Craw- 

 ford Co. in the valley of the Wabash R. Tupelo Gum [A^. uni- 

 flora Wang.] N. aquatica L. 



91. Araliaceae Vent. — Ginseng Family 



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



1. 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 in southern 111. July-Aug. 



Hercules'-club A. spinosa L. 



1. Herbs. 



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

 nard A. racemosa L. 



2. Umbels 2-7. 



3. Plant leafy-stemmed, prickly or bristly; woods, rare; Cook 



and Lake counties. June-July. Bristly Aralia 



A. hispida Vent. 



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

 in the northern half of the state; also Macoupin Co. May- 

 June. Wild Sarsaparilla A. nndicaulis L. 



2. Panax L. — Ginseng 

 P. quinquejolius L. Rich woods, becoming rather rare. July-Aug. 



92. Umbelliferae Scop. — Parsley Family 



1. Leaves simple, rigid, paralbl-veined, remotely bristly on the margins: in- 

 florescence capitate 1. Eryngium 



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 ternatcly decompound with lanceolate or ovate, toothed 

 leaflets; flowers (in our species) white: roots aromatic ....5. Osmorhiza 

 3. Ovary and fruit with hooked or barbed bristles. 



4. Plants glabrous: leaves palmately 3- to 7-foliolate; ovary and fruit 



with hooked bristles 4. Sanicula 



4. Plants pubescent; leaves pinnately decompound. 



5. Ovary and fruit with hooked bristles; rays of the umbel short 



3. Torilis 



5. Ovary and fruit with barbed bristles 2. Daucus 



2. Ovary and fruit not at all bristly or prickly (rarely tuberculate). 



