CARDUACEAE 1321 
Leaf-blades entire, toothed,. or merely incised. 
Leaves alternate or merely ono eens sometimes 
whorled on individual plant 
Involucre of Ad imbricate p bracts in 
sever 
Leaf-blades petioled or merely sessile. 
Leaf-blades petioled, often n long-petioled. 
Head 15-flowered: involucre cam- 
panulate : leaf-blades of a lanceolate 
type, borne horizontally. | LH. SEROTINA. 
Head about 5-flowered : aone cylin- 
dric: leaf-blades of an ovate type, 
borne vertically. . III. CRASSIFOLIA. 
Leaf-blades sessile or essentially so. 
Leaf-blades narrowed at the base. 
Braets of the involucre acute, acu-  . 
minate, or mucronate. IV. ALBA. 
Bracts of the involucre obtuse or 
indiv idually mucronulate. V. HYSSOPIFOLIA. 
f-blades broad at the base. . "VI. ROTUNDIFOLIA. 
Leaf-blades connate-perfoliate or connate- 
clasping. VII. PERFOLIATA. 
Involucre of nearly equal bracts in one row, or 
= few outer ones shorter. VIII. UrTICAEFOLIA. 
Leaves in aioe of 3-6. IX. PURPUREA. 
Shrub: opie plant of hammocks, X. VILLOSA 
I. CAPILLIFOLIA 
Leaf-segments filiform 
nflorescence-branches secund-recurved: inner invo di u- 
cral bracts prommenily ae aaa. gradually 
[one arista 1. E. leptophyllum. 
Iuforcoccnco Di anches  fastigiate: inner  involucral 
acts obscurely scarious, pierre short-aristate. . 2. HE. capillifolium. 
Leaf-segments linear, linear- ‘filiform, or lanceolate. 
eaf-blades 1- or 2-par 
Bdorcs nes panióulate or thyrsoid. 
Heads 3-6-flowered, not eiomeraté on the inflo- 
rescence-branches : bracts of the involucre 
punctate and viscid. 3. E.compositifolium. 
Heads 6-9-flowered, glomerate or clustered at the 
ends of the inflorescence- branches: bracts of 
the involucre he oe punctate nor viscid 4. E. Eugenei. 
Inflorescence corym D. E. pinnatifidum. 
Leaf-blades mainly pectinately pinnatifid. 6. E. pectinatum. 
II. SEROT 
Tall rather coarse, herb with coarsely ee long- 
petioled leaf-blades not placed vertically. T. E. serotinum. 
CRASSIFOLIA 
Low, somewhat ds herbs, with repand or crenate- . . 
dentate petioled leaf-blades placed vertically. 8. E. mikanwvoides. 
IV. ALBA 
WS of the upper cauline leaves linear or of a linear . 
9. E. leucolepis. 
Blades E d upper cauline leaves ovate, lanceolate, or 
Bracte of the mature involucre copiously fine-pubescent, 
a arious- -margined, the inner ones 5.5 mm. long or l 
10. E. anomalum. 
Boo of the mature involucre glabrous or with seat- — 
hairs, more or o AA LIOUR: margined, the 
inner ones 7 mm. long o 
Inner bracts of the involucre of petaloid, long- 
ct 
t 
acuminate, uw d subulate 1. E. album. 
Inner bracts the invuluere petaloid, short- | 
mucronate, linear patula te. 12. E. petaloideum. 
HYSSOPIFOLIA 
Leaf-blades linear, often narrowly so or n filiform. 
Inner bracts of the involucre uid I long, outer 
bracts lanceolate: achene 2.5-3 lone 13. E. hyssopifolium. 
