Sinapis alba. White Mustard. 



SINAPIS Lin. Gen, PL Tetradynamia Siliojtosa. 



Cal. patens. Cor. ungues recti. Glandula inter ftamina breviora et piftillum, 

 interque longiora et calycem. 



Rati Syn. Gen. 21. Herbje tetrapetal^: siliquos^ et siliculosje. 



SINAPIS alba, filiquis hifpidis : roftro obliquo longiffimo enfiformi. Lin. Syjl. Vegetab. p. 503. 

 Sp. PL p. 933. Haller Uifi. 466. 



SINAPIS alba. Scopoli FL Cam. n. 843. 



SIN API apli foliis. Bauh. Pin. 99. 



SINAPI album filiqua hirfuta, femine albo vel rufFo. i". B. II. 856. 



SINAPI fylveftre minus ? Parkins. 830. Rait Syn. p. 295. White Muftard. Hud/on. PL Angl. ed\ 

 2. p. 298. Lightfoot FL Scot. p. 36 r. 



« — » — — 1 1 — : w , . — ; — . — . . , , ,m , r a *^rm 



RADIX annua, fimplex, fibrofa, albida. ^ ROOT annual, fimple, fibrous, and whitifh. 



CAULIS fefquipedalis ad bipedalem, erectus, ramofus, ? STALK, a foot and a half to two feet high, upright* 

 craffiufculus, firiatus, tener, fragilis, hirfutus, I branched, fomewhat clumfy, finely grooved r 



pilis numeroiis, rigidiufculis, deorfum veriis. % tender, brittle, and hirfute, the hairs nume- 



| rous, ftiffifh, and turned downward. 



FOLIA petiolata, altema, radicalia et pleraque eaulina, % LEAVES {landing on foot-ftalks, alternate, thole next 

 pallide virentia, venofa, utrinque hirfutula, | the root and moft of thofe on the ftalk pin- 



pinnis trium circiter parium, inferioribus mi- ^ nated, of a pale green colour, veiny, flightly 



nimis, extima fubtriloba, omnibus varie den- 1 hirfute on both fides, compofed of three or 



tatis. | four pair of pinnas, the lowermoft of which 



t are very fmall, the terminal one often three- 



I lobed, and all of them varioufly indented. 



FLORES lutei, terminales. 1 FLOWERS yellow, and terminal. 



PEDUNCULI tetragono-ftriati. | FLOWER- STALKS having four grooves or corners. 



CALYX: Perianthium tetraphyllum, foliolis paten- 1 CALYX: a Perianthium of four leaves, which ate 

 tibus, concavis, deciduis, laevibus, fublineari- | Jpreading, concave, deciduous, fmooth, fome- 



bus, apice obtufis, Jig. 1, 2. | what linear, and blunt at top, fig. 1, 2. 



COROLLA : Petal a quatuor, fubrotunda, plana, pa- t COROLLA : four roundim Petals, flat, fpreading, en- 

 tentia, integra, unguibus ere&is, linearibus, | tire, claws upright, linear, fcarcely the length 



longitudine vix calycis, fig. 3. % of the calyx, fig. 3. 



STAMINA: Filament a fex, quorum duo breviora, | STAMINA : fix Filaments, two of which are fhorter 

 virefcentes, fubulatae. Antherje luteae, erectae, $ than the reft, of a greeniih colour, and taper- 



iubfagittatae, 'fig. 4* | ing. Anthers yellow, upright, fomewhat 



I arrow-fhaped, fig. 4. 



GLANDULE ut in plerifque hujus generis, fig. 5. % GLANDS as in molt of this genus, fig. 5* 



PISTILLUM : Germen obovatum, fubangulofum, ad | PISTILLUM : Germen inverfely ovate, flightly angu- 

 lentem hiipidum. Stylus fubulatus, anceps, % lar, hifpid when magnified. Style tapering, 



germine duplo fere longior, ftaminibus paulo| two-edged, almoft twice the length of the 



brevior. Stigma capitatum, fig. 6. | germen, and a little fhorter than the ftamina. 



% Stigma forming a little head, fig. 6. 



PERICARPItJM : Siliqua hirfuta, fubarticulata, fub- 1 SEED-VESSEL: a hairy Pod, fomewhat jointed, con- 

 tetrafperma, roftro longiffimo enfiformi ter- % taining about four feeds, terminated by a very 



minata, fig. 7, 8. | long Iword-fhaped beak, fig. 7, 8. 



SEMINA majufcula, fufca,/g. 9. $ SEEDS rather large and brown, fig. 9. 



In the corn-fields in Buckinghamfhire, efpecially about High Wycomb, the Sinapis alba is as common, and as 

 troublefome a weed among the corn as the arvenjis: with us it is found more fparingly. It is frequently met with 

 on banks, and among the corn in Baterfea-fields, and well known to conftitute a part of young fallading. 



Ray has been particularly happy in pointing out the ftriking characters of the feveral fpecies of Sinapis, which 

 LinnjEus has adopted. The feed-veffels, either in their form, fize, or manner of growth, will always with 

 certainty diftinguifh them; but as thefe plants may occur when they are not fufficiently advanced to exhibit thofe 

 characters, it is neceliary to call in others to our affiftance : we may then, in addition to Linn^eus's fpecific 

 characters, obferve, that the Sinapis alba is raoft obvioufly diftinguifhed from the nigra by having its folk finely 

 grooved, and flron^ly haired^ and from the arvenjis, for which it is perhaps much more liable to be miftaken, by 

 having its leaves more divided or jagged as our figure exprefles. 



It flowers in June, and ripens its feeds in July. 



