SESLANIA-SIUa 139 



SESLANIA, 16—10. {Leguminosas.) 



veslca'ria, (y. Au.) leaves pinnate; leafets oblong, ob'use, glabrous; racemes 

 shorter than the leaves. 5-7 f. S. 

 SESUVIUM. 11-5. (FicoidecB.) 



scssi'le, (r. Ju.) flowers sessile ; leaves linear-oblong, flat. Stem succulent. 

 Sea-coa.'it. 

 SEYMERIA. 13—2. {Scrophularim.) 



tenuifo'lia, (y-p. Au. ©.) glabrous, very branching ; leaves compound-pinna- 

 tifid ; segments filiform, opposite and alternate ; corolla subrotate. 3-4 f. S. 



pectina'ia, leaves pectinate-pinnatifid. 

 SICY03. 19 — 15. {Cucurbitaceee..) [From the Greek siiwos, a cucumber.] 



a'/i^wte'te, (single-seed cucumber, w. ©•) 1^^^*^^ cordate, back lobes obtuse. 

 5-angled, scabrous, denticulate; tendrils umbellate ; steril flowers corymb- 

 ose-capitate, with the common peduncle long ; fertile flowers sessile ; fruit 

 small, ovate, hispid. 

 SIDA. 15—12. OMalvaceca.) [Origin of the name doubtful.] 



abu'tilon, (Indian mallows, y. Ju. ©.) leaves round-cordate, acuminate, tooth- 

 ed, tomentose; peduncles solitary, shorter than the petioles; capsule 2-awn- 

 ed, truncate. 4-6 f. 

 SJLENE. 10—3. (.Caryophxjllem.) 



pennsylva'tiica, (pink-catchfly, p. M. J. %.') viscidly pubescent; radical leaves 

 wedge-form ; stem leaves lanceolate ; panicles trichotomous ; petals slightly 

 emarginate, very obtuse, sub-crenate. 8-12 i. 



virgin'ica, (r. J. %.) erect, or decumbent; viscidly pubescent; leaves lance- 

 oblong, scabrous on the margin ; panicle dichotomous; petals bifid; stamens 

 exsert. 12 i. 



antirrhi'na, branches and peduncles very erect ; calyx broad-oval, shining ; blos- 

 soms nocturnal; corolla small, whitish. Dry hills. 



injla'ta, calyx bladder-like, and beautifully veined; flowers white, petals bifid. 

 Bladder campion. Rocky hills. Ex. 



arme'ria, (w-v. Au. ©.) flowers fascicled, fasligiate ; upper leaves cordate, 

 glabrous ; petals entire. Ex. 



co'nica. calyx of the fruit conic, striate. Ex. 



dichoV onm, racemes in pairs, terminal, 1-sided ; flowers intermediate, pedun- 

 cled. Ex. 

 6ILPHIUM. 17-4. {Corymbiferm.) 



perfolia'luM, (ragged-cup, y. Au. %.) stem 4-angled, smooth, leaves opposite, 

 connate, ovate, serrate. 6 f. Rays 24. Mountains. 



trifolia'tum, leaves verticillate by threes; panicle trichotomous; stem 4-6 f. 

 high, mostly purple ; ray florets about 14, long, bright yellow. 

 SINAPIS. 14—2. (Craajer®.) 



ni'gra, (common mustard, y. J. ©.) silique glabrous, 4-angled, close pressed 

 to the stem; leaves at the top lance-linear, entire, smooth. Naturalized. 



al"ba, (white mustard,) pod mostly hispid, spreading; flowers corymbo.se. 1-2 

 feet. Introduced. 

 SYSYMBRIUM. 14 — 2. (.CrucifertB.) [From sisubos, fringe ; so called from its fringed roots. 



officin"ale, (y. Ju. ©.) leaves runcinate, hairy; flowers in a long raceme ; pod 

 subulate. 1-2 f. Stem hairy, branched. Road-sides. 



SISYRINCHIUM. 15-3. (.Iridea.) 

 an"ceps, (blue-eyed grass, b. J. %.) scape or culm simple, 2-edged or 2-winged ; 

 glume-like spatha of 2 unequal valves, extending above the flower ; petals, 

 mucronate. Hedge-mustard. 6-12 i. 

 voucr una' turn, scape simple, winged ; spatha coloured, one of the valves end- 

 ing in a long, rigid point ; stem setaceous, 6-10 i. Flowers 3-4 in a .spatha, 

 blue. 

 STUM. 5—2. iUmbelliftriB.') [From seto, to move ; from its agitation In the water.] 

 latifo'lium, (water-parsnip, w. Ju. %.) root creeping; stem erect, angular; 

 Ifiaves pinnate ; leafets ovate, lanceolate, sessile, smooth, serrate, sometimes 

 33 



