Doa-Wooi) Family. 65 



nate with the petals. Styles slender, recurved above, persistent. Cells of 

 the ovary with ti single suspended ovule. 



A. racemosa L. Spikenard. Stem smooth, branched; leaves large, biter- 

 nate-pinnate; leaflets ovate, base cordate, doubly serrate, taper-pointed; um- 

 bels numerous, racemose; styles 5, united; fruit 5-celled. Rich woods; July; 

 frequent. 



A. naudicaulis L. Wild Sarsaparilla,. Nearly stemless; roots long, hori- 

 zontal; leaf long-stalked, ternate, divisions 3-5-foliolate; leaflets ovate, taper- 

 pointed, serrate; umbels 2-5, on a scape shorter than the leaf-stalk; fruit 5- 

 celled. Rich woods; May-June; infrequent; Winneshiek, Allamakee, Fayette, 

 Scott, Muscatine, Henry, Johnson, Story, and Winnebago counties. 



A. spinosa L. Hcrcttlcx Club. A shrub or low tree, 8-30 feet high, stern 

 and stalks prickly; leaves long-petioled, bipinnate; leaflets ovate, pointed, 

 serrate, glaucous and more or less pubescent beneath; umbels in terminal 

 compound panicles, peduncles and pedicels pubescent; flowers white. Rich 

 soil; June-August; an escape from cultivation; Johnson county. 



PANAX L. Ours a perennial herb, from a fusiform, simple or branched root. 

 Leaves at the summit of the stem, verticillate,.digitately compound. Umbel 

 simple, solitary, terminal. Calyx-limb obscurely 5-toothed. Petals 5, spread- 

 ing-. Stamens 5, alternate with the petals. Styles 2-3. 



P. quirtquefolia L. Qiiisciuj. Stem slender, 1-foot high; leaves palmately 

 3-7-foliolate; leaflets mostly 5, stalked, obovate-oblong, taper-pointed, 

 coarsely serrate; flowers greenish" yellow; styles 2; fruit 2-celled, bright red. 

 Rich woods; July-August; becoming infrequent; Winneshiek, Fayette, Jack- 

 son, Delaware, Muscatine, Henry, Johnson, Story, and Cerro Gordo couuties. 

 (A. qulnqucfolia Dec. & PI.) 



CORNACEAE Link. Dog- Wood Family. 



Ours shrubs, with simple opposite or alternate exstipulate leaves, and 

 cymose flowers. Calyx-tube adherent to the 1-2 celled ovary; limb 

 minute, toothed or lobed. Petals valvate in the bud, distinct, alternate 

 with the calyx-teeth, epigynous, sometimes wanting. Stamens as many 

 as the petals, and alternate with them. Ovules pendulous. Fruit a 1-2- 

 seeded drupe, crowned with the calyx. 



CORN US L. Leaves with one exception opposite, entire. Flowers per- 

 fect, white in our species. Sepals, petals, and stamens 4. Style 1, slender; 

 stigma terminal, flat or capitate. Drupe with a 2-celled, 2-seeded stone. 



* Leave* opposite. 

 f Leaves glabrate or minutely pubescent beneath. 



C. paniculata L'Her. Panicled Cornel. Dogwood. A shrub 3-10 feet hiffh, 

 branches erect, grayish, smooth; leaves lanceolate or ovate-lanceolate, long- 

 acuminate, base acute, minutely appressed-pubescent on both sides, pale be- 

 neath; flowers cymose-paniculate, white; fruit globose, white: stone subglo- 

 bose, slightlj' furrowed. Rich soil, woods and thickets; May-June; common. 

 (C. eandidisslma Marsh.) 



C. stolonifera Mx. Red-osier Dogwood. Shrub 3-12 feet high, multiplies 

 freely from stolons thus forming clumps; the branches bright red-purple, 

 glabrous or slightly, appressed pubescent; leaves oval, ovate, or ovate-lanceo- 

 late, acute or short acuminate, base rounded or narrowed, minutely pubescent 

 on both sides, whitish beneath; flowers in flat-topped cymes, white; fruit 



