( 508 .) 
LE'DUM * *. 
Linnean Class and Order. Df.ca'ndria f, Monogy'nia. 
Natural Order. Eri'ceac+, Brown's Prod. p. 557. — Lindl. Syn. 
p. 172 ; Introd. to Nat. Syst. of Bot. p. 182. — Loud. Hort. Brit. p. 
523. — Mack. FI. Hibern. p. 179. — Hook. Brit. FI. (4th ed.) p. 4 1 1 . — 
Erica'cea: ; tribe, Rhodo'rea., Don’s Gen. Syst. of Gard. and 
Bot. v. iii. pp. 785 and 788. — Loud. Arb. et Frutic. Brit. pp. 
1076 and 1078. — Ericinea:, Rich, by Macgilliv. p. 450. — Ericas, 
Juss. Gen. PI. p. 159. — Sn>. Gram, of Bot. p. 115. — Syringales; 
subord. Ericosas; sect. Ericina:; type, Ericacea: ; subtype, 
Ericid^e ; Burn. Outl. of Bot. v. ii. pp. 900, 937, 944, 946, and 
948. — Bicorn es, Linn. 
Gen. Char. Calyx (see fig. 5.) inferior, very small, of 1 sepal, 
in 5 egg-shaped, spreading segments. Corolla (see fig. 2.) of 5 
spreading, egg-shaped, concave, rounded petals. Filaments (see 
fig. 2.) from 5 to 10, thread-shaped, spreading, the length of the 
corolla. Jlnlhcrs (see figs. 2, 3, & 4.) oblong, roundish at the base, 
opening by 2 terminal pores. Germen (see fig. 2.) egg-shaped. 
Style (see figs. 2 & 5.) thread-shaped, as long as the stamens. 
Stigma blunt. Capsule (see figs. 5, 6, & 7.) roundish or somewhat 
egg-shaped, of 5 cells, and 5 valves, the dissepiments formed by the 
inflexed margins of the valves, opening from the base and between 
the dissepiments. Seeds (see figs. 8 & 10.) numerous, flat, strap- 
shaped, roughish, furnished with a membranous wing at each 
extremity. 
The minute, 5-toothed calyx ; the 5-petaled corolla ; the anthers 
opening by 2 terminal pores ; the 5-celled, 5-valved, many-seeded 
capsule, opening at the base ; and the flat, strap-shaped seeds, co- 
vered with a pellucid membrane or arillus ; will distinguish this 
from other genera in the same class and order. 
One species British ? 
LE'DUM PALU'STRE. Marsh Ledum. Marsh Wild-Rosmary. 
Spec. Char. Leaves strap-shaped, revolute at the margin, downy 
beneath. Stamens 10. 
Hook. FI. Lond. folio 210. t. 212. — FI. Dan. t. 1031. — Lodd. Bot. Cab. t. 560. — 
Linn. Sp. PI. p. 561. ; FI. Suec. p. 135. ; FI. Lapp. (2nd edit.) p. 127. — Willd. Sp. 
PI. v. ii. pt. i. p. 602. — Ait. llort. Kew. 1st edit. v. ii. p. 65. ; ibid. 2nd edit, 
v. iii. p, 48. — Pnrsh. FI. Amer. Sept. v. i. p. 300. — With. (7th ed.) v. ii. p. 520. — 
Lindl. Syn. p. 173. — Hook. Brit. FI. p. 187. — Maer. Man. Brit. Bot. p 152. — 
Don’s Gen. Syst. of Gard. and Bot. v. iii. p. 851. — Loud. Arb. et Frutic. Brit. v. ii. 
p. 1155. f. 966 ; Encycl. of Trees and Shrubs, p. 603. f. 1150. — Lddum Site- 
Tig. 1. A Leaf seen from the under side. — Fig. 2. A Flower. — Fig. 3. Back view 
of a Stamen. — Fig. 4. Front view of a Stamen. — Fig. 5. Calyx and Pislil. — Fig. 6. 
Capsule ( nat . size). — Fig. 7. Capsule separating with ils valves. — Fig. 8. Portion 
of a valve, to show the receptacle of the Seeds. — Fig. 9. A single Valve. — Fig. 10. 
A Seed — All, except fig. 6. more or less magnified. — Sections from the •• Flora 
Loudinensis.” 
* From the similarity of ils foliage to that of the Cistus Ledum. 
f See folio 37, note t. t See folio 419, a. 
