ASTER MACROPHYLLUS 303 
4th, glandular capitate pubescence, mingled with the strigose 
hairs, much shorter but more extensively distributed, more abun- 
dant and persistent; best developed on the branches and branch- 
lets, but continuing well-down the stem, typically to within 6 in. 
of its base. Glands quite odorous, subspherical, purplish,2~3- 
times the breadth of their stalks, or less. Stalks one-celled, dis- 
tinct, 4~6 times the length of the gland, straight, stiff and divari- 
cate. Similar but shorter and closer glandular hair covers the ex- 
posed backs of bracts, sometimes, however, with but few glands 
remaining. On petioles and lower leaf-surfaces smaller paler 
shorter-stalked glands are scatteringly developed, at least when 
young; but much less so than in A, zanthinus and some other 
violet-rayed allies. 
The preceding. leaf-types all gradually pass into each other; 
only the lower and upper caulines are markedly characteristic ; 
and the lower is often duplicated in the form in the non-glandular 
A. Schreberi and both the lower and the upper in A. swdcymosus. 
Inflorescence of vigorous plants a compound, uneven, deep- 
branched corymb rising to different levels, with stiff pedicels often 
I in. long, the plant bearing sometimes as many as 80 heads. 
Smaller and perhaps more common plants produce a broad flattish 
expanded corymb usually not large and with rather few remotish 
heads, 15—20, on stiff stocky pedicels, % in. long or more. 
Pedicels and branches given off at about the same angle, about 
40°, nearly straight or slightly upcurved at the base, and some- 
what clavate or thickened toward their summits, terete. Their 
characteristic grouping is in 3’s, making the branches seem trifur- 
cate, additional subsessile lateral buds developing subsequently. 
eads about % in. high and 1 in. broad, or slightly more. 
Involucre campanulate, broad-based, triseriately chequered, about 
ig in. high, subtended by a rather closely appressed bracteal 
which is cymbiform, oblong and obtuse, and usually deciduous. 
Bracts stiffly coriaceous, broadly triangular-acute in aspect, 
pale, with somewhat oblong-triangular thickening at the green tip, 
the exposed surface densely covered with short stiff glandular 
hair. Bract-forms principally 3, changing gradually in breadth 
and shape and apex ; Ist, basal bracts, acute, short-triangular, the 
lowest much broader than high; the next triangular-ovate, sub- 
ciliate, brownish-green and close-puberulent all over; 2d, middle 
bracts, about two rows, oblong-ovate or broad-oblong, obtusish, 
more ciliate and green-tipped ; 3d, upper or inmost bracts, taper- 
oblong or linear-oblong, obtuse, thinnish, subciliate, with little 
green or none. 
Rays about 16, or only 13, about ;f; in. long, linear-oblong, 
not so broad or narrow as in various allies, tridentate at the 
