322 ASCLEPIADEZ. 
2. Acerates circinalis, Dene. in Ann. Sc. Nat. série 2, ix. p. 322, t. 11. fig. o; 
DC. Prodr. viii. p. 522. 
SoutH Mexico, San Felipe (Andrieuz, 238), Hb. Kew. 
3. Acerates gomphocarpoides, Dene. in DC. Prodr. viii. p. 522. 
Soura Mexico, Toluca (Andrieux, 235). Hb. Kew. 
4, Acerates humilis, Benth. Pl. Hartw. p. 291. 
Souta Mexico, Leon (Hartweg). Hb. Kew. 
7. ASCLEPIAS. 
Asclepias, Linn. Gen. Plant. n. 306; Benth. et Hook. Gen. Plant. ii. p. 754. 
About sixty perennial herbaceous species, the greater part inhabiting North America, 
including Mexico, a few in Central and South America, two in Africa, and one now 
widely dispersed in warm regions, though probably introduced in most places. 
1. Asclepias angustifolia, Schweig. Enum. Pl. Hort. Bot. Regiomont. 1812, 
p. 13; Reem. et Schult. Syst. Veg. vi. p. 70, non Ell. 
Asclepias virgata, Balb. Cat. Stirp. Hort. Acad. Taur. 1813, p. 14; Lag. Nov. Gen. et Sp. 1815, 
p. 14; Sweet, Brit. Fl. Gard. ser. 2, t. 85; A. Gr. in Proc. Am. Acad. xii. p. 70. 
Asclepias linifolia, H. B. K. Nov. Gen. et Sp. iii. p. 190. 
Asclepias verticillata B. linifolia, Dene. in DC. Prodr. viii. p. 570. 
Nort Mexico, region of San Luis Potosi, 6000 to 8000 feet (Parry & Palmer, 581); 
SoutH Mexico, Misteca Alta, Oaxaca, 7000 feet ( Galeotti, 1509), Orizaba (Botteri, 1068), 
and many garden specimens. Hb. Kew. 
2. Asclepias auriculata, H. B. K. Nov. Gen. et Sp. iii. p. 191, t. 228; DC. 
Prodr. viii. p. 570. 
SootH Mexico, San Felipe, near Oaxaca (Andrieux, 232), near Ario, 6000 feet 
(Humboldt & Bonpland), oak-woods at 2000 feet (Galeotti, 1507, 1513), region of 
Orizaba (Bourgeau, 2904). Hb. Kew. 
3. Asclepias bidentata, Hemsley, n. sp. 
Glabrescens, foliis petiolatis tenuibus ovato-lanceolatis usque ad semipedalibus, umbellis inter- 
petiolaribus longiuscule pedunculatis, cucullis supra columnam sessilibus latis ventre apice 
bidentatis, ligula lunata breviter exserta, ovariis ventre pilosulis. 
Herba erecta, glabrescens, caulibus simplicibus (?), teretibus, leviter puberulis. Folia opposita, 
breviter petiolata, tenuia, primum plus minus pilosula, ovato-lanceolata, 4-6 poll. longa, usque 
ad 2 poll. longa, longe acuminata, acuta, basi rotundata, venis transversis remotiusculis, incon- 
spicuis. Flores mediocres, umbellati; umbelle interpetiolares, pedunculate, multiflora, 14-2 
poll. diametro; pedunculi 1-2 poll. longi, pilosuli; pedicelli 5-10 lineas longi, pilosuli, 
gracillimi, bracteis brevibus angustissimis; calycis segmenta angusta, acuta, extus pilosula; 
corollz lobi oblongi, 4-5 lineas longi, arcte reflexi, intus basin versus minutissime papillosi ; 
cuculli (corone squame) supra columnam lineam longam sessiles, antheras paulo superantes, 
lati, inflati, dorso apice truncati, ventre bidentati, i.e. marginibus sursum producti; ligula 
(processus interior cuculli) arcuata vel lunata, leviter exserta; ovaria ventre leviter pilosula, 
levia. Folliculi desunt. 
SoutH Muxico, Real del Monte (Coulter, 985). Hb. Kew. 
