230 THE FLORA. 



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

 Berries red, remaining through the winter. 



2. HOUSTO'NIA. Bluets. 



Calyx tube round egg-shaped, 4-cleft, persistent. Corolla tubular, mncn 

 exceeding 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. 



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

 Corolla funnel-form. Peduncles many-flowered, cymous....b 

 a Flowers terminal. Small, delicate herbs....!, 2 

 a Flowers axillary. Small, delicate herbs. . . .3, 4 



b Leaves Jance-ovate. Cymes terminal 5 



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



1 H. coeru'lea. Dwarf Pink. Stems very numerous, upright, 8-6'. Root leave* 



ovate-spatulate. Flowers pale blue. May, Junt.. 



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



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

 8 H. min'ima. Tiny B. Leaves linear-spatulate. Steins 1-3' high. Prairies. 

 4 H. rotundifo'lia. Round-leaved B. Lvs. roundish. Stems 2-5'. 8. Mts. 

 f> 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. longifo'lia. Long-leaved I. Stems 4-10', erect. Leaves oval-elliptic, 



narrowed to end. 



7 H. angustifo'lia. Narrow-leaved 1. Stems l-2f. erect. Lvs. linear. Flowers 



numerous. W. S. 



ORDER LXX. COMPOS TLE. Asterworts. 



An immense family of herbs or shrubby plants, with compound flowers, 

 that is, I\IQ flowers (or floret*) 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 

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

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

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



In this Order the pupil wi'rl remember that the heads are called radiate, 

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



