( 446 .) 
Bl'DENS* *. 
Linnean Class and Order. Syngene'sia f, Polyga'mia, 
TEqualis + 
Natural Order. Compo'sit.e§; tribe, Corymbi'fer.e ||, Juss. 
— Lindl. Syn. pp. 140 & 142. ; Introd. to Nat. Syst. of Bot. pp. 
197 & 199. — Mack. FI. Hibern. p. 142. — Hook. Brit. FI. (4th ed.) 
p. 410. — Compo'sitas ; subord. Helia'nthea;, Loud. Hort. Brit, 
pp. 520 & 521. — Synanthe'ke^e ; tribe, Corymbi'feile, Rich, 
by Macgilliv. pp. 454 & 455. — Corymbifera:, sect. 6. Juss. Gen. 
PI. pp. 177 & 187. — Sm. Gram, of Bot. pp. 121 & 124 ; Engl. FI. 
v. iii. p.334. — Syringalks ; suborder, Asteros.e; sect. Aste- 
hin.e; subsect. Astfrian.e ; type, Asterace.e ; Burn. Outl. of 
Bot. pp. 900, 901, 920, 924, & 926. — Compo'sitje, Linn. 
Gen. Char. Involucrum ( common Calyx ) upright, of many 
oblong, nearly equal, parallel scales, concave, or channelled, at the 
back ; the outer ones often leafy. Corolla compound, of several, 
parallel, level-topped, perfect, tubular, regular and equal florets, 
(see fig. 1.); their limb egg-shaped, with 5 marginal, spreading 
segments. Filaments 5. hair-like, very short. Anthers in a cylin- 
drical tube, slightly prominent. Germen (see fig. 1.) oblong com- 
pressed, with 2 or more bristly upright points, about equal to the 
tube of the floret, on its outside. Style (see figs. 2 & 3.) thread- 
shaped, as long as the stamens. Stigmas oblong, spreading beyond 
the anthers. Seed-vessel none hut the unaltered close calyx. Seed 
(fig- 4.) compressed, angular, abrupt, rough at the edges. Pappus 
(see figs. 1 & 4.) of 2 or more permanent awns, which are rough 
with minute deflexed bristles. Receptacle (see fig. 6.) flat, chaffy. 
[Corolla sometimes radiant). 
The involucrum of many scales ; the outer ones often leafy ; the 
pappus of 2 or more permanent awns, which are rough with minute 
deflexed bristles ; and the chaffy receptacle ; will distinguish this 
from other gen. ra, with discoid florets, in the same class and order. 
Two species British. 
Bl'DENS TRIPARTI'TA. Three-lobed Bur-marigold. Trifid 
Water-Hemp-Agrimony. Bastard Agrimony. Water Hemp. Dou- 
ble-Tooth. 
Spec. Char, Leaves petiolate, in 3 or 5 spear-shaped, deeply 
serrated segments. Outer scales of the Involucrum unequal, entire 
or serrated, many times longer than the flower. Fruit oblong- 
wedge-shaped. Pappus of 2 or 3 bristles. 
Engl. Bot. t. 1113.— Curt. FI. Loml. t. 237.— Linn. Sp. PI. p. 1165.— Huds. FI. 
Angl. (2nd ed.) p. 355. — Willd. Sp. PI. y. iii. pt. in. p. 1715. — Sm. FI. Brit, v. ii. 
p. 858. ; Engl FI. v. iii. p. 398. — With. (7th ed. ) v. iii. p. £13. — Gray’s Nat. Arr. 
Fig. 1. A separate Floret, with its Germen, and a single Scale of the Receptacle 
attached to its base. — Fig. 2. Stamen and Pistil. — Fig. 3. Pistil. — Fig. 4. A Seed. — 
Fig. 5. Section of ditto. — Fig. 6. Receptacle. 
* Front bis, double ; and dens, u tooth ; from the a«ns or teeth which crown 
the fruit. 
See fol. 91, u. -f-. } See fil. 117, n. {. 
? See fol. 27, a. 
