( 404 .) 
SILA'US* * 
Linnean Class and Order. Penta'ndria f, Digy'nia. 
JVatural Order. Umbelli'ferje^, Juss. Gen. PI. p. 218. — Sm. 
Gram, of Bot. p. 132. — Lindl. Syn. p. Ill ; Introd. to Nat. Syst. 
of Bot. p. 4. — Rich, by Macgilliv. p. 463. — Loud. Hort. Brit. p. 
517. — Don’s Gen. Syst. of Card, and Bot. v. iii. p. 235. — Mack. 
F!. Hibern. p. 113. — Hook. Brit. FI. (4th ed.) p. 408. — Umbellatae, 
Linn. — Rosales ; sect. Angelicinaj ; type, Angelicaca; : subty. 
AngeliciDjE ; Burn. Outl. of Bot. v. ii. pp. 614, 770, 773, & 774. 
Gen. Char. Flowers nearly regular, imperfectly separated, the 
innermost more or less abortive. Calyx none. Corolla (see fig. 1.) 
superior, of 5, equal, inversely egg-shaped, oblong petals, entire or 
somewhat emarginate, with an inflexed point. Filaments (see fig. 1 .) 
5, thread-shaped, rather spreading, as long as the petals. Anthers 
roundish. Germen (see figs. 1 & 2.) inferior, egg-shaped, blunt, 
slightly compressed, ribbed. Styles in the flower very short, after- 
wards elongated, spreading, cylindrical, half the length of the fruit, 
tumid at the base. Stigmas blunt. Floral Receptacle (see fig. 2.) 
annular, thin, undulated ; at first upright, afterwards depressed by 
the swelling bases of the styles. Fruit egg-shaped, a little com- 
pressed, somewhat contracted at the upper part, crowned with the 
floral receptacle, and permanent, spreading or recurved, styles. 
Carpels with 5 sharp, somewhat winged, equal ridges, of which 
the lateral forms a margin. Channels (see fig. 3.) with many vittce. 
Seed nearly oval. Universal Involucrum few-leaved, or none ; 
partial involucrum of several strap-spear-shaped leaves. 
The obsolete calyx ; the corolla of 5 inversely egg-shaped, entire 
or somewhat emarginate petals, with an inflexed point; the oval 
fruit ; the carpels with 5 sharp, slightly winged ridges ; and the 
channels with several vittce ; will distinguish this from other genera 
in the same class and order. This genus is nearly allied to Li- 
gusticum. 
One species British. 
SILA'US PRATE'NSIS. Meadow Sulphur-wort. Meadow 
Pepper-saxifrage. English Saxifrage. 
Spec. Char. Leaves thrice pinnate ; leaflets strap-spear-shaped, 
opposite. General involucrum of 1 or 2 leaves, sometimes wanting. 
Besser enum. pi. Vohl. p. 43. N°. 1367 .fide Don. — Gray's Nat. Arr. v. ii. p. 
523. — Lindl. Syn. p. 1 18. — Hook. Brit. FI. p. 121. — Don’s Gen. Syst. of Ganl. and 
Bot. v. iii. p. 319.— Macr. Man. Brit. Bot. p. 101.— Bah. FI. Bath. p. 20.— Lightf. 
FI. Shrop. p. 127. — Luxf. Reig. FI. p. 25. — Mack. FI. Hibern. p. 118. — Cnidium 
Sildus, Spreig. Prod. p. 40. — Sm. Engl. FI. v. ii. p. 91. — With. (7th edit.) v. ii. 
p. 373. — Johnst. FI. Berw. v. i. p. 71. — Winch’s FI. of Northumb. & Durh. p. 20. — 
Walker’s FI. of Oxf. p. 83.— Irv. Lond. FI. p. 196.— Cow. FI. Guide, p. 27.— 
Peucedanum Silaus, Linn. Sp. PI. p. 354.— Engl. Bot. t. 2142.— Mart. FI. Rust. 
Fig. 1. A Flower. — Fig. 2. Germen. — Fig. 3. A transverse section of the Fruit. 
* A name used by Pliny, for an umbelliferous plant. Don. 
4 See folio 48, note T. % See folio 235, a. 
