SEN 



S E R 



The first sorts are ornamental on walls, build- beautiful purple colour, and the disk yellow. It 



mgs, and rock-works, as well as in pots ; and 

 the last two kinds among other potted green- 

 house plants. 



SENA. See Cassia. 



SENECIO, a genus containing plants of the 

 herbaceous, annual, and perennial kinds 



is a native of the Cape, flowering from June at 

 Julv till the beginning of autumnal frosts. 



There are varieties with very double purple, 

 and with equally double white flowers. The 

 former is now chiefly cultivated. 



There are many other species that may be cul- 



It belongs to the class and order Syngenesia tivated for variety 



PolytrumicTSupeijlua, and ranks in the natural Culture.— The first and two last sorts are 



order of Composites Discoidece. readily increased by planting cuttings of the 



The characters are: that the calyx is common branches in pots filled with line mould in the 

 calycled, conical, truncate : scales awl-shaped, summer season, shading them till they have 

 very many, parallel in a cylinder contracted taken root ; and, as the winter approaches, re- 

 above, continuous, equal, fewer covering the moving them under the protection of the green- 

 base imbricatewise, the tops mortised : the co- house, where they should remain till May, when 

 rolla compound, higher than the cal vx : corollets they may be planted out in the borders or clumps, 

 hermaphrodite, tubular, numerous' in the disk : They may likewise be raised from seed, which 

 females ligulate in the ray, if any present : pro- should be sown in the spring in pots, and placed 

 per in the hermaphrodites funnel-form : border in a gentle hot-bed. 



reflex, five-cleft: in the females, if any, ob- The second sort should be more carefully at- 



long, obscurely three-toothed : the stamina in tended, being raised from off-sets, which should 



the hermaphrodites, filaments five, capillary, very be planted in pots in the spring season, and 



small: anther cylindric, tubular: thepistillum in plunged in the hot-bed of the stove, where the 



both: germ ovate: style filiform, length of the plants should be constantly kept. 



stamens: stijjmastwoj oblong, revolute: there is The first and two last sorts afford variety in 



no pericarpium : calyx conical, converging: the borders, and among potted plants ; and the se- 



seeds in the hermaphrodites solitary, ovate: pap- cond in stove collections. 



pus capillary, long ; in the females very like the 

 hermaphrodites: the receptacles naked, flat. 



The species cultivated are: 1. S. hieracifolius, 

 Hieracium-Ieaved Groundsel ; 2. S. Pseudo- 

 China, Chinese Groundsel; 3. S. hastatus, 

 Spleen wort-leaved Groundsel ; 4. S. elegans, Ele- 

 gant Groundsel, or Purple Jacobaea. 



The first is an annual plant, with a round, 

 channelled, hairy stalk, rising three feet high : 

 the flowers in a state of terminating umbel, 

 composed of dirty-white florets. It is a native 

 of North America, flowering in August. 



The second species has a perennial root, com 



SENGREEN. See Saxifraga. 



SENNA. See Cassia. 



SENNA, BLADDER. See Colutea. 



SENNA, SCORPION. SccEmerus. 



SENSITIVE PLANT. See Mimosa. 



SERRATULA, a genus containing plants of 

 the tall, hardy, herbaceous, perennial kind. 



It belongs to the class and order Syngenesia 

 Polygamia JEaxtaVis, and ranks in the natural 

 order of Composites Capitatce. 



The characters are : that the calyx is common 

 oblong, subcylindrical, imbricate, with lance- 

 olate, acute or obtuse, awnless scales : the co- 



posed of some 'thick fleshy tubers, sending out rolla compound tubulous, uniiorm : corollets 



many fibres on every side ; from which come out hermaphrodite, equal: proper one-petalled, 



some large cut leaves shaped like those of the funnel-form : tube bent in ; border ventricose, 



turnep, but smooth: the flower-stalk slender, five-cleft: the stamina have five capillary, very 



afoot and half high, sustaining at the top a few short filaments: anther cylindrical, tubulous: 



yellow flowers. It is a native of the East Indies, thepistillum is an ovate germ: style fihrorm, 



The third has a herbaceous perennial stalk, length of the stamens: stigmas two, oblong, 



branching out at the bottom, and rising about reflex: there is no pericarpium: calyx 



two feei and a half high; having narrow leaves 

 at bottom, seven or eight inches long: the 

 upper leaves are smaller, and embracing ; they 

 are very clammy: the upper part of the stalk 

 divides into several very long peduncles, each 

 sustaining one yellow flower. It is a native of 

 the Cape, doweling most part of the summer. 



The fourth species is an annual pl.mt, having 

 m&nv herbaceous branching stalks, near three 

 feet high: the flowers are produced in bunches 



changed : the seeds solitary, obovate : pappus 

 sessile, feathered: the receptacle chaffy, flat. 



The species cultivated are: 1. S. Noveboracen- 

 sis, Long-leaved Saw-wort; 2. S.prtcalta, Tall 

 Saw-wort; 3. S. glauca, Glaucous-leaved Saw- 

 wort : 4. S.si/uarrosa, Rough-headed Saw-wort ; 

 5. S. scariosa, Ragged-cupped Saw-wort; 6. S. 

 spicata, Spiked Saw-wort. 



The first has a perennial root: the stalks se- 

 veral, channelled, seven or eight feet high ; the 



on the top of the stalks ; are large, the ray of a leaves from four to five inches long, and one 



