230 THE FLORA. 



M, re'pens. Common in woods. Leaves round-ovate. Flowers white or pinkish. 

 Berries red, remaining through the winter. 



2. IIOUSTO'NIA. Bluets. 



Calyx tube round egg-sliaped, 4-cleft, persistent. Corolla tubular, mncL 

 c seceding the calyx, limb 4-lobed, spreading, filaments 4, on the corolla. 

 Style 1. Capsule 2-lobed, half-free.— Herbs. Stipules connected to the 

 petiole. Flowers never yellow. 



§ Corolla salver-form, glabrous. Peduncles 1-flowered a 



§ Corolla funnel-form. Peduncles raany-fiowered, cymous b 



a Flowers terminal. Small, delicate herbs 1, 2 



a Flowers axillary. Small, delicate herbs 3, 4 



b Leaves lance-ovate. Cymes terminal. . . .5 

 b Leaves lance-linear. Cymes terminal 6, 7. 



1 H. coeru'lea. Dwarf Pinlc. Stems very numerous, upright, 3-6'. Root leave* 



ovate-spatulate. Flowers pale blue. May^ June. 



2 H. serpyllifo'lia. Thyme-kaved B. Stems thread-form, decumbent, 6-12'. Leaves 



round-ovate, petiolate, fringed. Flowers on long stalks, pale. S. 



3 H. min'una. Tiny B. Leaves linear-spatulate. Stems 1-3' high. Prairies. 



4 H. rotundifo'Iia. Round-leaved B. Lvs. roundish. Stems 2-5'. S. Mts, 



5 H. purpu'rea. Prairie Innocence. Stems upright, much branched. If, with numer- 

 ous clusters of roseate or white, very delicate flowers. W. S. 



6 H. loiigifo'lia. Long-leaved I. Stems 4-10', erect. Leaves oval-elliptic, 



narrowed to end. 



7 H. angustifo'Ua. Narrow-leaved I. Stems l-2f. erect. Lvs. linear. FlowerB 



numerous. W. S. 



Order LXX.— COMPOS'ITJS. Asterworts. 



An immense family of herls or shrubby plants^ with compound flowers^ 

 that is, ih-Qjioioers {or florets) collected into close heads upon a common 

 receptacle, and surrounded by an involucre of many bracts (called scales)^ 

 with 5 stamens which have their anthers united into a tube around the 

 style, with the calyx tube closely adhering to the 1 -celled ovary (an ache- 

 nium in fruit), and the calyx limb crowning the ovary in the form of a 

 fappus consisting of scales, awns, bristles, or hairs, or else entirely want- 

 ing; the corolla consisting of 5 united petals, either strap-shaped (ligulate 

 or tubular, and the style 2-cleft at the top. 



In this Order the pupil will remember that the heads are called radiate.^ 

 when the outer florets only liave rays or are ligulate (see Fig. 498) ; radi- 



