ORDER 70.—ASTERWORTS. 219 
M.re’pens, Common in woods. Leaves round-ovate. Flowers white or pinkish. 
Berries red, remaining through the winter. 
2. HOUSTO'NIA. Bluets. 
Calyx tube round egg-shaped, 4-cleft, persistent. Oorolla tubular, much 
exceeding the calyx, limb 4-lobed, spreading, filaments 4, on the corolla. 
Style 1. Capsule 2-lobed, half-free——Herbs. Stipules connected to th 
petiole. Flowers never yellow. 
§ Corolla salver-form, glabrous. Peduncles 1-flowered....a 
§ Corolla funnel-form. Peduncles many-flowered, cymous....b 
a Flowers terminal. Small, delicate herbs....1, 2 
a Flowers axillary. Small, delicate herbs....8, 4 
b Leaves lance-ovate. Cymes terminal....5 
b Leaves lance-linear. Cymes terminal....6, 7. 
1 H.ceru’lea. Dwarf Pink. Stems very numerous, upright, 3-6’. Root leaves 
ovate-spatulate. Flowers pale blue. May, June. 
2 H.serpyliifo/lia, Thyme-leaved B. Stems thread-form, decumbent, 6-12’. Leaves 
round-ovate, petiolate, tringed. Flowers on long stalks, pale. 8. 
8 H.min’ima. Yiny B. Leaves linear-spatulate. Stems 1-8’ high. Prairies, 
4H. rotundifo/lia. Round-leaved B.. Lvs. roundish. Stems 2-5’. 8. Mts. 
5 H. purpu’rea. Prairie Innocence. Stems upright, much branched, 1f., with numer- 
ous clusters of roseate or white, very delicate flowers. W.S. 
6 H. longifo’lia. Long-leaved J. Stems 4-10’, erect. Leaves oval-elliptic, 
narrowed to end. 
7 H. angustifo’lia. Narrow-leaved I. Stems 1-2f. erect. Lvs, linear. Flowers 
numerous. W.S8. 
Orper LXX.—COMPOSITA. Asterworts. 
An immense family of herbs or shrubby plants, with compound flowers, 
that is, the flowers (or florets) collected into close heads upon a common 
receptacle, and surrounded by an involuere 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 
pappus 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 have rays or are ligulate (see Fig. 498); radi- 
