480 ROSACEAE (ROSE FAMILY) 



oi the pedicels appressed ; receptacle broadly ovoid-conic or subglobose. — 

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

 peariii,:,' as if introduced, but apparently passing without sharp limit into tlie 

 /oUowhii; clearly indigenous var. americana. (Introd. from Eurasia ?) Var. 

 ALBA (Ehrh.) Kvdb. 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 

 S-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. indica (Andr.) Eocke. Fruit red, insipid. (Fragaria Andr.) — Waste 

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

 from Eurasia.) 



12. SIBBALDIA L. 



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

 Stamens 5, alternate v/ith 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 Sibhald, professor at Edin- 

 burgh at the close of the 17th century.) 



i. S. prociimbens L.' Leaflets o, wedge-shaped, 3-toothed at the apex ; petals 

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

 Rocky Mts. to Utah. (Eurasia.) 



13. CHAMAERHODOS Bunge. 



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

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

 Carpels 6-20; styles decidedly lateral or basilar, articulated near the base. 

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

 3-foliolate leaves ; the leaflets cleft into linear segments. (Name from x^Mat, on 

 the ground, low, dicarf, and p65ov, a rose.) 



L C. er§cta (L.) Bunge. Glandular-pubescent; root woody; stem erect, 

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

 small rounded cymes. — Sandy soil, arid prairies, etc., u. 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 

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

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

 with chiefly radical 3-5-lobed or divided leaves, and small yellow flowers on 

 bracted scapes. ( Kamed in honor of Francis Adam, Count of Waldstein-Wsn-ien- 

 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 calyx-lobes has been distinguished as W. ^arvijiora Small. 



