58 TETRANDRIA — MONOGYNIA. [Dipsacus. 



20. RupPiA. Flowers 2, on a spadix arising from the sheathing 

 bases of the leaves, which perform the oflBce of a spatha. Peri- 

 anth 0. Drupes^, pedicellate, tlieir 7/?<^s one-seeded. — Nat. Ord. 



Naiadks, Juss Named after Henry Bernard Ruppius, author, 



in 17 J 8, oi Flora Jenensis, 



21. Sagi'na. Cal. of 4 leaves. Petals 4, (shorter than the 

 calyx.) Capsule 1-celled, 4-valved. — Nat. Ord. Caryophylle^, 

 Juss. — The name (signifying meat which fattens) is little appli- 

 cable to any of the minute plants belonging to this genus. 



22. MfENCHiA. Cal. of 4 leaves. Petals 4 (as long as the cal.) 

 Caps, of one cell, opening with 8 teeth at the extremity. — Nat. 

 Ord. Caryophylle^, Juss. — Name given in compliment to 

 Conrad dlanc/i, Professor of Botany at Hesse Cassel. 



23. TiLLJEA. Oil. 3— 4-partite. Pet. 3 or 4. Caps. 3 or 4, 

 two-seeded. — Nat.Ord. CRASSULACEiE,Z)e Cand. — Named after 

 Michael Angelo Tilli, an Italian Botanist who wrote in 1723 a 

 catalogue of the plants in the Medical Garden of Pisa. 



24. Radiola. Cal. of 4 leaves united up to their middle, and 

 mostly 3-cleft. Petals 4. Caps, of 8 cells and 8 valves. — Nat. 

 Ord. LiNE.^;, De Cand. — Named from radius, Si ray, I presume 

 in consequence of the ray-like segments of the calyx. 



(See Cerastium tetratidrum in Cl. X. Ord. III.) 



TETRANDRIA— MONOGYNIA. 



1. Dipsacus. Linn. Teasel. 



1. D. * Fulloniim, L. {Fullers Teasel); leaves subconnate, 

 scales of the receptacle hooked at the extremity, involucres 

 spreading (reflexed, Sm.) E. Bat. t. 2080. 



Waste places and hedge-banks ; rare. Ft. July, Aug. $ . — Stem 4 — 5 

 feet high, very angular and prickly. Leaves large, oblong, or oblong- 

 lanceokte, obtusely and irregularly serrated, sometimes, especially the 

 upper ones, connate. Involucre spreading, about as long as the head of 

 flowers. Flowers in oval heads, pale purple or whitish. — Used in dressing 

 cloth, for which purpose the hooked scales of the receptacle are admira- 

 bly calculated. These hooks become obsolete by long cultivation in a 

 poor soil,' and there is reason to believe that D. Fullonum is but a var. 

 of J), sylvestris. 



2. D. sylvestris, L. {wild Teasel); leaves opposite rarely con- 

 nate, scales of the receptacle straight at the extremity, invo- 

 lucres curved upward. E. Bot. t. 1032, 



Road-sides and hedges, not rare in England ; less frequent in Scot- 

 land. FL July. $ . 



3. D. pilosu-s, L. {small Teasel); leaves petiolate with a small 

 leaflet at the base on each side, involucres shortly deflexed. E. 



Bot. t. 67 7. 



Moist hedges, but not common. In several places in Norfolk and 

 Sulfolk, Sussex and Surrey. Rare in Scotland. Fl. Aug. Sept. ^ . — 



