230 Compostte@—S tokesta. 
toothed, the inner ciliated. Receptacle naked, fleshy. Outer 
florets largest. Pappus of one row of membranous scales, nearly 
equalling the corolla. Named in honour of an English 
botanist. 
1. S. cyanea.—Stem herbaceous, covered with a close cottony 
down, glaucescent, about 2 feet high. Leaves sessile, alternate, 
lanceolate, acute, with a few spiny teeth near the base; lower 
ones much longer. Flowers blue, glandular, produced in 
September. A native of Carolina, and rather tender. 
2. PECTIS. 
Leaves opposite, usually narrow and entire, and furnished 
with pellucid dots. Flower-head small; involucre of a single 
row of bracts ; receptacle naked. Pappus bristly or scaly. An 
American genus of about thirty species, of which one hardy 
annual has lately been introduced. 
1. P. angustifolia A dwarf annual 4 to 6 inches high 
with yellow fragrant flowers. North-west America. 
Trisze IL. EUPATORIE A. 
Leaves usually opposite. Florets all tubular and herma- 
phrodite. Branches of the style usually club-shaped or en- 
larged at the extremities. 
3. AGERATUM. 
Annual herbs with opposite leaves and blue or white 
flowers. Involucre of many imbricated linear bracts. Recep- 
tacle naked. Pappus composed of several awned scales broad 
at the base. This genus includes a few American species, and 
one widely distributed throughout the tropics. Name from 4, 
not, and yfipas, old age, probably in reference to the absence of 
white pappus on the achenes. 
1. A, Mexicanwm.—This has long been a favourite bedding 
and border plant, on account of the profusion of its lilac-blue 
flowers. There is a white-flowered variety, and recently some 
dwarf forms have been raised, but unfortunately their beauty 
is of short duration. 
Ceelestinia ageratovles and cceriilea are closely allied garden 
plants in which the pappus is toothed and cup-shaped. 
Mikania scéndens is a tender South American twining plant 
with glabrous shining cordate leaves and yellowish white 
