480 KOSACEAE (ROSE FAMILY) 



of the pedicels appressed ; receptacle broadly ovoid-oonic or subglobose. — 

 Dooryards, old fields, dry open woods, etc.; chiefly from N. E. to Pa., often ap- 

 pearing as if introduced, but apparently passing without sharp limit into the 

 following clearly indigenous var. americana. (Introd. from Eurasia ?) Var. 

 Alba (Ehrh.) Rydb. Receptacle white. — N. E., N. Y., and Pa. 



Var. americana Porter. Slender, thin-leaved ; pubescence of the scapes as 

 well as of the pedicels and sometimes also of the petioles more or less closely 

 appressed, often sparse ; receptacle more narrowly conical or subcylindric-ovoid. 

 {F. americana Britton.) — Common, chiefly in open rocky woods. 



11. DUCHESNEA Sm. Indian Strawberry 



Calyx 5-parted, the lobes alternating with much larger foliaceous spreading 

 3-toothed appendages. Petals 5, yellow. Receptacle in fruit spongy but not 

 juicy. Flowers otherwise as in Fragaria. — Perennial herb with leafy runners 

 and 3-foliolate leaves similar to those of the true strawberries. (Dedicated to 

 Antoine Nicolas Duchesne, an early monographer of Fragaria.) 



1. D. fNDiCA (Andr.) Focke. Fruit red, insipid. {Fragaria An&r.) — Waste 

 ground, grassy places, etc., s. N. Y. and e. Pa. to Fla., Ark., and Mo. (Introd. 

 from Eurasia.) 



12. sibbAldia l. 



Calyx flattish, 5-cleft, with 5 bractlets. Petals 5, linear-oblong, minute. 

 Stamens 5, alternate with the petals, inserted into the margin of the woolly disk 

 which lines the base of the calyx. Achenes 5-10; styles lateral. — Low and 

 depressed perennials. (Dedicated to Dr. Bobert Sibbald, professor at Edin- 

 burgh at the close of the 17th century.) 



1. S. prociimbens £. Leaflets 3, wedge-shaped, 3-toothed at the apex ; petals 

 yellow. — Arctic Am., s. to mts. of e. Que., White Mts., N. H. ; and in the 

 Eocky Mts. to Utah. (Eurasia.) 



13. CHAMAERHODOS Bunge. 



Calyx top-shaped, 5-oleft, without bractlets. Petals 5, obovate, white or 

 purplish, about as long as the calyx-lobes. Stamens 5, opposite the petals. 

 Carpels 5-20 ; styles decidedly lateral or basilar, artifculated near the base. 

 Ovule solitary, ascending. — Erect pubescent essentially herbaceous plants with 

 3-foliolate leaves ; the leaflets cleft into linear segments. (Name from x"!""', on 

 the ground, low, dwarf, and p6dov, a rose.) 



1. C. erficta (L.) Bunge. Glandular-pubescent; root woody; stem erect, 

 1-3 dm. high, ofi,3n with ascending branches, leafy ; flowers small, crowded in 

 small rounded cymes. — Sandy soil, arid prairies, etc., n. w. Minn, to Col., 

 Mont., and Assina. (Siber.) 



14. WALDSTEiNIA Willd. 



Calyx-tube inversely conical ; the limb 5-cleft, with 5 often minute and de- 

 .ciduous bractlets. Petals 5. Stamens many, inserted, into the throat of the 

 calyx. Achenes 2-6, minutely hairy ; the terminal slender styles deciduous 

 from the base by a joint. Seed erect ; radicle inferior. — Low perennial herbs, 

 wit)i chiefly radical 3-6-lobed or divided leaves, and small yellow flowers on 

 bracted scapes. (Named in honor of Francis Adam, Count of Waldstein-Wsiiten- 

 burg, a German botanist.) . 



1. W. fragarioides (Michx.) Trattinick. (Barren Strawberry.) Low ; 

 leaflets 3, broadly wedge-form, cut-toothed ; scapes several-flowered ; petals 

 mostly longer than the calyx-lobes. — Wooded hillsides, Carlton Co., N. B. 

 (Hay) ; w. N. E. to Ga., Ind., and Minn. A form with narrow petals about 

 equaling the oalyx-Iobes has been distinguished as W- parviflora Small. 



