ParT 1, 1922] CARDUACEAE: VERNONIEAE 95 
VERNONIA ARISTATA (Cass.) Less. Linnaea 4:313. 1829. (Lepidaploa aristata Cass. 
Dict. Set. Nat. 26:17. 1823.) 
VERNONIA CHRYSOPAPPA Daniels, Univ. Missouri Stud. Sci. 1:364. 1907. 
VERNONIA HYPOLEUCA DC. Prodr. 5:27. 1836. 
VERNONIA PROFUGA De-Not. Ind. Sem. Hort. Genuen. 1840. 
VERNONIA TOLUCCANA DC. Prodr. 5:30. 1836. 
8. EREMOSIS (DC.) Gleason, Bull. N. Y. Bot. Gard. 
eee SOG. 
Turpinia Llave & Lex. Nov. Veg. Descr. 1: 22. 1824. Not Turpinia Humbl. & Bonpl. 1807. 
Monosis § Eremosis DC. Prodr. 5:77. 1836. 
? Llerasia Triana, Ann. Sci. Nat. IV. 9: 37. 1858. 
? Critoniopsis Schultz-Bip. Pollichia 20-21: 430. 1863. 
Stems frutescent or arborescent, freely branching and usually more or less tomentose. 
Leaves alternate, pinnately veined, entire or denticulate. Inflorescence of close, compact, 
round-topped, corymbiform clusters terminating the branches and forming a compound panicle. 
Heads 1—8-flowered, homogamous, sessile or short-peduncled. Involucre cylindric to narrowly 
campanulate, the scales appressed, imbricate in several series, the inner much prolonged, 
broadest usually above the middle, deciduous at maturity and not spreading. Receptacle 
naked, subconvex. Corolla blue or purple, tubular, regularly 5-cleft. Anthers sagittate, the 
lobes obtuse or acute at base. Style-branches slender. Achenes 3-10-ribbed, truncate, 
usually pubescent. Pappus capillary, in two series, the inner of barbellate bristles, the outer 
similar, shorter, irregular in length. 
Type species, Monosis salicifolia DC. 
Achenes with 5—10 prominent ribs, glabrous to hirsute; heads 1—8-flowered. 
Heads 3- or 4-flowered. 
Middle and inner involucral scales obtuse to acuminate. 
Leaf-blades glabrous or nearly so beneath. 1. E. triflosculosa. 
Leaf-blades pubescent to tomentose beneath, at least on the 
veins 
Leaf-blades glabrous to subtomentose on the lower surface 
(excluding the veins); pappus 4-5 mm. long; heads 
3-flowered. 
Leaf-blades lanceolate, not especially tomentose on 
the veins. 2. E. Palmert. 
Leaf-blades elliptic, densely tomentose on the veins 
alone. 3. E. barbinervis. 
Leaf-blades densely tomentose on the surface beneath; 
pappus 8 mm. long; heads 3—4-flowered. 4. E. ovata. 
Middle and inner involucral scales broadly rounded; heads 4- 
flowered; achenes thinly strigose-pubescent. 5. E. oolepis. 
Heads 1- or 2-flowered. 
Leaf-blades of a narrow type, usually less than one-third as wide 
as long, gradually narrowed to an acute base. 
Involucre campanulate, the inner scales not mucronate, at 
least 1.5 mm. wide. 
Achenes densely pubescent or hirsute. 
Leaves pubescent or subtomentose beneath: at least 
with tufts of tomentum in the axils of the veins. 6. E. salicifolia. 
Leaves glabrous or nearly so on both sides. 7. E. pallens. 
Achenes thinly pubescent to glabrate, glandular; leaf- 
blades white-tomentose beneath. 8. E. tarchonanthifolia. 
Involucre narrowly cylindric, the inner scales mucronate, less 
than 1 mm. wide. 9. E. angusta. 
Leaf-blades of a broad type, usually two-fifths, or more, as wide 
as long, abruptly narrowed to an acute, obtuse, or rounded 
base. 
Principal involucral scales, or some of them, prominently 
mucronate. 
Leaf-blades of an ovate type, broadest below the middle, 
silvery-tomentose beneath. 10. E. callilepis. 
Leaf-blades of an ovate type, broadest usually above the 
middle, merely puberulent beneath. 11. E. foliosa. 
Principal involucral scales not mucronate. 
Inner scales obtuse or rounded, ciliate; achenes glabrous 
or nearly so. 12. E. obtusa. 
Inner scales acute; achenes hirsute. 
Leaves pubescent on the veins beneath. 13. E. Steetzit. 
