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Show The Hiflory of p L A N T S. 3· Potamogeton Joliis /inearibus obtttjis, . c;uftl::;f~'(f!· Gra/Jy, obtttje-leaved Potamogeton, wtt . . . ofed of a clufier of fibres: the ftalk grows to twa The root of thts fpec.tes ts c~md p 11 h way in water . it fends out many branches, or three 1c eet •m 1e nco-th ' . tmhm ene a refft ede . at every join· t fiands a 1e a f , gra if,y , 1o ng, and is fiender, and fomew at comp t . ' a oint . each leaf has three longitudinal and thin, but terminating obtufely, ;o mt 't'~ baf;. the leaves fiand alternately, exribs . and alfo a pellucid, thflin mem ra~e r.a t ld there. they fiand oppofite: the fpike is ' h h f ikes of owers are m1er e , d h cept, w ere t e p d reenilh but with a little rednefs towar s t e center. . {bort, the flowers fm~ll an ~ R y calls it Potamogeiton caule compreffo, foho This is common m our nvers. a ' graminis capini. . h p t e 1 The long and broad, acute-leaved The other fpecies of t e ~tamogde Ion eadr 'Pot~mogeton 3 The branched, nar~ ' The long 1errate - eav · · Tl Potamogeton. z. '. The narrow, undulated-leaved Potamogeton. 5· le row-leaved Potamogeton. 4 6 The little round-fialked, graffy-leaved Potamany- leaved, graffy Pot1amdlgeto~. p ~ mogeton '8 The narrow, undulated-leaved mogeton. 7. The cur e - eave o a . . Potamogeton. SAG I N A. 1 of the Sagina is a perianthium, compofed of four oval, hollow, pa~ T HE ca yx manent leaves: the corolla confifis of four oval, obtufe, patent pe~ tent, an~ per h 1 x. the f\:amina are four capillary filaments: the antherre are tals, lhorter t an t e ~a yl b. ofe the fiyles are four fubulated, bent backward, and roundiili . the germen IS g o ; ' d fi 1 £ d f f, r . the fii mata are fimple : the fruit is an oval, covere cap u e, onn_e o ou ~~1~{s: and co~tains four cells : th.e feeds are numerous, very fmall, and affixed to the receptacle. ,I f D'll . and fame of the Alfines of other This genus comprehends the Alfine1 a o J emus, authors. 1 • Sagina fcapis unifloris. · ~mootl), fprtng The Sagina, with one flower on the .ftalk. ~\)tchllleen. '\I) The root of this beautiful little plant is compofed of a tuft of white, lhmif ~nd fl.e~d~r fibres . from this rife fix or eight leaves, a quarter of an inch long, fo~ ha ~ ~uc[; m bread;h broadefi: at the bafe, terminating in a point, fmooth and .go Y o~ \ e ;r ~ce, and eve~ at the edges : among thefe rifes a fialk, two or th~·ee mches . tg 1, en er, round and fmooth . at every joint of this f\:and two leaves, hke the radtcal ones, and witho~t pedicles; ;t the top fia_nds a fingle flower, large in proportion to the plant, and very beautiful, of a fnow whtte. 1 nd This is frequent in fpring in Hyde-park, and on Black-heath, &c. Magno , a others, call it Alfine verna glabra. 2. Sagina ramis procumbentibus. The procumbent-branched Sagina. The root of this fpecies is compofed of a few, white, capillary fibres: .the ra~i~a~ leaves are half an inch long, very narrow, fmooth on the furface,. and are dtfpofed re radiated form on the ground. !?e fialks grow to four or five mches long; they divery fiender procumbent and JOmted ; the leaves on them are iliorter than the !a cal ones ~nd narrow a~d frnooth. The flowers fiand fingly, on iliort pedtc1 e s, arifing f;om the alre of the leaves; they are very frnall, milk-white, and fall off very foon. 11 't This is frequent about Paris, but we have it not in England. Tournefort ca s 1 ' Alfine minima flore fugaci; Dillenius, Alfinella mufcofo flare repens. COLDE NIA. The Hijlory of P L A N T s. COLDENIA. THE calyx is a perianthium, compofed of four leaves: the corolla is of the infun.: dibuliform kind, and is compofed of four oblong petals: the ftamina are four fiender filaments; the anther~ are moderately large, and tumid; the germen is quadrifulcous; the fiyles are four, and {hort; the fruit is compofed of four feeds. There is but one known fpecies of this genus; it is a native of North America, and is too fufficiently charaCl:ered by this fruCtification, to need any farther defcription, Clefs the F iftb. PENTANDRIA. Plants which have in every flower jive flamina. 0 F this clafs fame have only one fiyle, fame two, fame three, fame four, fome five, and fame yet more. The genera comprehended under it are thence arranged into fix orders, according to the number of the fiyles; under each of which, being alfo very numerous, they will be again difpofedJ according to certain common and ~bvious charaCters, into a number of divifions. Clqfs the Fifth. Order the Firjl. P E N T A N D R I A M 0 N 0 G Y N I A • P /ants which have in each flower jive flamina and one fly/e. 0 F this order there are little lefs than a hundred genera, one fet of which have monopetalous flowers, fucceeded each by four feeds ; another have monopeta!ous flowers, with the capfules contained within them; a third have monopetalous flowers, with the germen placed b~low the flower; a fourth have declinated fiamina; a fifth have monopetalous flowers, with berries placed above the receptacle ; and, finally, a fixth have polypetalous flowers. Thefe are arranged feparately under fo many divifions. Clafs t.he Fijtb. Order tbe Firjl. Divijion the Firfl. Pentandria Monogynia, with monopetalous flowers, focceeded by four feeds each. The Herbce Afperifolice, in general, of Ray. HELIOTROPIUM. THE calyx of the Heliotropium is a permanent perianthium, formed of one leaf, tubulated, aqd divided into five parts at the edge; the corolla confifl:s of a fingle petal; the tube is of the length of the cup; the limb is plane, divided lightly into five fegments, and obtufe : the fmaller fegments fiand alternate, and are acute ; the larger are placed between ; the mouth is clofed by five prominent fquammuJre, which, bending toward one another, form a little fiar : the fiamina are five very thort filaments, placed in the mouth of the flower; the antherre are fmall, and covered : there are four germina; the fiyle is capillary, and of the length of the ftamina; the fiigma is emarginated : there is no pericarpium ; the calyx remains unalteredJ and contains four oval, acuminated feeds, s { f I . Heliotropium |