( 305 .) 
A'CERAS*. 
Linnean Class and Order. Gyna'ndria f, Mona'ndria. 
Natural Order. Orchi'deje, Linn. — Juss. Gen. PI. p. 64. — 
Sm. Gram, of Bot, p. 81. ; Engl. FI. v. iv. p. 3. — Lind I . Syn. p. 256 ; 
Introd. to Nat. Syst. of Bot. p. 262. — Rich, by Maccilliv. p. 412. — 
Loud. Hort. Brit, p.536. — Mack. FI. Hibern. p.274. — Macr. Man. 
Brit. Bot. p. 224. — Hook. Brit. FI. (4th edit.) p. 425. — Palmares ; 
order, Mxtsales; sect. Orchidina: ; type, OrchidaCeae ; Burn. 
Outl. of Bot. v. i. pp. 391, 437, 458, & 461. 
Gen. Char. Perianthium £, (calyx and corolla J (fig. 1.) su- 
perior. Sepals 3, egg-shaped, concave, equal, closely converging, 
ribbed, permanent. Petals 2, strap-spear-shaped, small, about as 
long as the sepals, which conceal them. Lip (nectary J (see fig. 1.) 
without a spur, hanging down, much longer than the sepals, strap- 
shaped, with 4 strap-shaped, entire lobes, the two uppermost longest, 
the disk strap-shaped, flat, and even. Anthers of 2 oblong mem- 
branous cells, close together, above the stigma. Pollen-masses 
(see fig. 3.) with 2 glands, contained in one common pouch. Germen 
(see fig. 2.) oblong, furrowed, nearly straight. Style (see fig. 3.) 
very short. Stigma a moist depression in front. Capsule (fig. 4.) 
inversely egg-shaped, slightly curved, furrowed. Seeds very nu- 
merous, tunicated. 
The herbaceous, converging, helmet-shaped perianthium ; the 
dependant, 4-lobed lip, without a spur ; and the pollen-masses with 
2 glands enclosed in one common pouch ; will distinguish this from 
other genera in the same class and order. 
One species British. 
A'CERAS ANTHROPO'PHORA. Man-bearing Aceras. Green 
Man-orchis. 
Spec. Char. Lip longer than the germen. 
Brown, in Ait. Hort. Kew. (2nd ed. ) vol. v. p. 191. — Sm. Engl. Fl. v. iv. p. 25. — 
Lindl. Syn. p. 262. — Hook. Brit. Fl. p. 374. — Gray’s Nat. Arr. v. ii. p. 200. — 
Macr. Man. Br. Bot. p. 227. — Rev. G. E. Smith’s PI. of S. Kent, p. 51. — Burn. 
Outl, of Bot. v. i. p. 15. fig. g. h. i. i. k. — O'phrys anthropophora, Engl. Bot. 
t. 29. — Curt. Fl. Lond. t, . — Curt. Brit. Entom. v. vi. t. 280. — Linn. Sp. PI. p. 
1343. — Huds. Fl. Angl. (2nded.) p. 390. — Sm. Fl. Brit. v. iii. p. 937. — Willd. Sp. 
PI. v. iv. pt. i. p. 63.— With. (7th ed.) v. ii. p. 41.— Relli. Fl. Cant. (3rd ed.) p. 
364. — Orchis anthropophora oreades, Ray’s Syn. p. 379. — Jacob’s PI. Feversh. 
p. 74. — Blackst. Sp. Bot. p. 63, — Orchis fiore nudi hominis effiyiem reprasen- 
tans.foemina, Bauh. Pin. p. 82. n. 7. — Rudb. Camp. Elys. v.ii. p. 193. n. 7. f. 6. — 
Vaill. Par. p. 147. t. 31. f. 19, 20. 
Localities. — In chalk-pits, and in dry chalky or clayey pastures; very rare. — 
Berks ; Near the highway from Wallingford to Reading, on the Berkshire side 
of the river: Merhett, 1G66. — Cambridgesh. In a close near Linton : Rev. 
R. Relhan. Furze-hills, Hildershain : W. H. Coi.eman, in N. B. G. — Essex ; 
On the borders of some corn-fields at Belchamp St. Paul, towards Ovington : 
Fig. 1. Front view of a Flower. — Fig. 2. Germen, Column, and Lip. — Fig. 3. 
Front view of the upper part of the Column, showing the stigma, and the pollen- 
masses, magnified. — Fig. 4. The Capsule. 
* A. privative, without ; and kcras, Gr. a horn ; in allusion to the absence 
of a spur. 
+ See folio 8, note +. 
t See folio 33, note t. 
