940 ASCLEPIADACEAE 
lowish or greenish yellow, fragrant: follicles very slender, 1-4 dm. long, 7 mm. wide, at- 
tenuate at each end, hairy: seeds 5 mm. long: coma 2-2.5 cm. long. [P. pubescens Ell. } 
1n sandy soil, North Carolina to Florida. Spring to fall. 
4. ACERATES Ell. 
Perennial caulescent herbs. Leaves opposite, alternate or scattered. Pedicels sub- 
tended by numerous involucral bracts. Flowers greenish or occasionally purplish tinged. 
Calyx small: lobes 5, acute, usually biglandulose at the sinus. Corolla rotate: lobes 5, 
small, reflexed in anthesis. Column very short, not always apparent, with commonly 
5-10 small glands or processes alternating with the anther-wings. Hoods mostly attached 
over the whole of the column, erect, equalling or shorter than the anthers, involute-con- 
cave, and somewhat pitcher-shaped, often pendulous and saccate at the base, entire, emar- 
ginate or 2-3-lobed or toothed at the apex, the ventral margins spreading towards the base 
into broad auricles or small infolded concealed lobes, either destitute of horns or crests or 
these rarely rudimentary. Anther-wings angulate near or somewhat below the middle, 
narrowed and rounded towards the base or rarely of the same width from the apex down- 
wards, entire or notched. Follicles as Asclepias. GREEN MILKWEED. 
Auricles of the hood, when present, concealed within. 
Hoods rounded, entire at the summit, much shorter than the anthers. vA: Floridana. 
Hoods entire, rounded or acutish at the summit, as high as the anthers. 2. A. viridiflora. 
Auricles of the hood conspicuously spreading. ] 
s emarginate or truncate at the summit, crestless within. _ 9. A. auriculata. 
Hoods 3-lobed at the summit, with an internal crest-like midrib, terminating in ATE 
the middle lobe. 4. A. angustifolia. 
1. Acerates Floridàna (Lam.) A. S. Hitchcock. Plant minutely scrabo-pubescent, 
becoming glabrate. Stems 3-8 dm. high or higher : leaf-blades linear to elongated linear- 
lanceolate, 7-16 cm. long, 3-5 cm. wide: umbels 2 or 3-several, usually many-flowered : 
p ole 1-1.3 em. long: corolla-lobes oblong, about 3 mm. long, dull purple without : 
oods purplish, oval, obtuse, slightly pendulous at the base, adnate at the base to the 
upper part of the distinct column, rising to about the middle of the anthers : anther-wings 
angled at the middle : follicles erect on recurved fruiting pedicels, fusiform, 7-10 cm. long, 
minutely puberulent : seeds 7 mm. long: coma 3-4 em. long. [A. longifolia Ell. ] 
On prairies and in wet pine lands, Wisconsin and Ohio to Florida and Texas. Spring to fall. 
2. Acerates viridifldra (Raf.) Eaton. Plant tomentose-puberulent, becoming gla- 
brate. Stems 2-6 dm. high, often procumbent : leaves opposite or some of them scattered ; 
blades short-petioled, 4-6 cm. long, oval or oblong, obtuse and retuse or acutish, usually 
mucronate, sometimes with undulate margins, becoming leathery : umbels globose, sessile 
or nearly so, 2-5 or more, lateral, densely many-flowered : pedicels about 1 em. long : 
corolla-lobes oblong-lanceolate, about 5 min. long : hoods inserted over the whole short 
column, dull purplish or at least tinged with purple, erect, nearly equalling the anm 
lanceolate-oblong, entire, except for a pair of Te infolded and concealed auricles at the 
base: accessory processes 5 : anther-wings salient above the middle, half-rhomboid, entire, 
or possibly obscurely notched, tapering towards the base: pollinia 2-5 mm. long, ation 
ated to the short caudicles: follicles 6-10 cm. long, erect on recurved pedicels, fusiform, 
attenuate, glabrous or minutely puberulent: seeds 7 mm. long: coma 2.5-3 cm. long. 
In dry ile soil, N orida, Texas, New Mexico 
and jan Wo NECI e Pont Se ig ne ie ae leaf-blades, Me 
anther-wings rather more abruptly tapering at the base, ranges from Illinois and Nebraska to bg oed 
Georgia and Louisiana. Another form, A. viridiflora linearis A. Gray, with low stems, elongated, bed 
leaf-blades, and often a solitary umbel, ranges from the Northwest Territory to Minnesota, Louis 
and New Mexico. : 
3. Acerates auriculàta Engelm. Plant glabrous, glaucous. Stems 2-8 dm. high, 
mostly solitary, sinuous above when old and rarely branched : leaves alternate-scatier. : 
sometimes crowded ; blades narrowly linear or filiform-linear, 5-14 cm. long, the ds 1 S 
margins not always revolute, becoming leathery and often twisted with age : petia uu 
long, slender : involucral bracts slender, minutely puberulent: umbels many -flower: due 
eral. 1 or 2, or sometimes 16 on the same stem : column very short : calyx-lobes me eid 
uberulent: corolla-lobes greenish, tinged with dull purple on the outside, about zio 
ong: hoods yellowish, with often a urplish keel, erect, crenately truncate or — hae 
at the apex, the involute sides spreading at the base into broad, obscurely cre Ti in- 
anther-wings narrow and of equal width, entire or notehed and twisted at the mk ie: 
curved over the anthers at the summit, the intermediate spaces marked by a vertica 
