tube glabrous or slightly villous below; calyx lobes linear-lanceolate, entire, 

 obscurely glandular-serrate, reflexed after anthesis; stamens about 20; anthers 

 yellow to rose-color; fruit short-oblong, slightly pruinose, dull-green tinged with 

 red, 8-15 mm. long. 



In low wet woods and on dryish hills in e. Tex., fruiting Sept.-Oct.; endemic. 



Our plant has been referred to var. edita (Sarg.) E. J. Palm. (C. edita Sarg.) 

 whose anthers are rose-color instead of being yellow as in var. berberifolia. 



7. Crataegus viridis L. Green haw^thorn. 



Tree sometimes to 12 m. high, with slender unarmed or sometimes thorny 

 branchlets and thin scaly pale-gray bark over orange-brown inner bark; leaves 

 variable and often asymmetrical, thin, glabrous at maturity except for tufts of 

 tomentum in the axils of the veins beneath, on flowering branchlets mostly 

 rhombic or oblong-elliptic, 2.5-5 cm. long, 13-25 mm. wide, finely serrate above 

 the middle or nearly to the base, on vegetative shoots often ovate and sharply 

 serrate and sharply lobed or deeply cut toward the base; petioles slender, 1.2-5 

 cm. long; flowers 12-15 mm. wide, numerous in glabrous or rarely pubescent 

 corymbs; stamens about 20; anthers small, pale-yellow or rarely red; fruit sub- 

 globose, 5-8 mm. thick, red or orange-red, with thin juicy fleshy and usually 5 

 nutlets. C. Davisii Sarg. 



In low wet or alluvial woods, and fields in sandy soils and clays in e. Okla. 

 and e. and s.-cen. Tex., fruiting Sept.-Nov.; from Va. and Fla., w. to 111., Mo., 

 Okla. and Tex. 



Those plants with somewhat villous-pubescent corymbs and branchlets are 

 segregated as var. velutina (Sarg.) E. J. Palm. (C. velutina Sarg.). Those plants 

 with leaves shorter than typical have been segregated as f. abbreviata (Sarg.) 

 E. J. Palm. (C. abbreviata Sarg.), a possible hybrid of this species with C. mollis. 



4. Duchesnea Sm. Indian Strawberry 



About 6 species native to Asia. 



1. Duchesnea indica (Andrz.) Focke. 



Perennial herb from a short rhizome, with leafy stolons and 3-foliolate leaves 

 similar to those of the true strawberries; leaflets ovate to elliptic, 2-4 cm. long, 

 crenately toothed, sparsely strigose on lower surface; peduncles 3-10 cm. long; 

 flowers solitary, 15-18 mm. wide; calyx 5-parted, the lobes alternating with much 

 larger foliaceous spreading 3-toothed appendages; petals 5, yellow; receptacle in 

 fruit spongy but not very juicy; fruit bright-red, resembling a strawberry, insipid, 

 about 1 cm. in diameter. 



Edge of low woods and thickets, seepage areas and marshes, along roadsides 

 and in old fields in s.e. Okla. {Waterfall) and e. Tex., Mar.-Aug.; nat. of Asia 

 that is established in many parts of the world. 



5. Potentilla L. Cinquefoil. Five-finger 



Herbs or rarely shrubs with compound leaves and solitary or cymose flowers 

 whose parts are rarely in fours; calyx flat, deeply 5-cleft, with as many bractlets 

 at the sinuses so as to appear 10-cleft; petals 5, usually roundish; stamens few 

 to many; achenes numerous, collected in a head on the dry mostly pubescent or 

 hairy receptacle, often partly enclosed by the persistent accrescent calyx; styles 

 slender, lateral or terminal, deciduous. 



About 500 species chiefly throughout the North Temperate Zone. 



1. Petals dark-reddish-purple 1, P. Thurberi. 



1. Petals yellow to whitish (2) 



1021 



