164 AST 



and downy;) flowers racemed; petals linear; germs puoesccm; 

 segments of the calyx glabrous. 



1912. ARUM. 



Triphyl"lum, (Indian turnip, wild turnip, wake robin, O. p. g. & v. 

 M. 7|.) sub-caulescent ; leaves ternate ; leafets ovate ; acuminate, 

 spadix club-form ; spatha ovate, acuminate, peduncled with the la- 

 mina as long as the spadix. One variety, virens, has a green spa- 

 tha, another, atropurpureujn^ has a dark purple spatha; another, aZ- 

 bum has a white spatha. 1 5. f. 



185. ASCLEPiAS. (From JEsculapius, the Founder of 

 Medicine.) 



1 . Leaves opposite. 



Syri'aca, (common milkweed, O. w. p. Ju. QJ.) stem very simpk , 

 leaves lanceolate-oblong, gradually acute, downy beneath; umbels 

 sub-nodding, downy, 3 to five feet high ; flowers in large, close clus- 

 ters, sweet-scented pollinia are fly traps. 3 5. f. 



Inctirna'ta, (O. r. Ju. 7|.) stem erect, branching above, downy; leaves 

 lanceolate, sub-downy both sides ; umbels mostly double at their ori- 

 gin; the little horn of the nectary exsert. A variety pulckra is more 

 hairy. Var. glabra, almost glabrous. Var. alba, has white flowers. 

 Damp. 3. f. 



61. ASPARAGUS. (A Greek name.) 



Exotic. 



Offi>cina"lis, (asparagus, Ju. Tj.) stem herbaceous, unarmed, sub-ereci, 

 terete ; leaves bristle- form, soft ; stipules sub-solitary. Naturalized 

 in the northern and southern districts. 4. f. 



172. ASTER. (A Star.) 

 Leaves entire. 



Linariifo"lius, (star-flower O. p. y. Au. Tj.) leaves thick-set, nerve- 

 Jess, linear, mucronate, dotted, carinate, rough, stiff, those on the 

 branches recurved ; stem sub-decumbent ; branches level topped, 1- 

 flowered ; calyx imbricate, of the length of the disk ; stem rough, 

 purplish. 



Midtijl'orus, (O. w-y. Au. to Nov. 7J.) leaves linear, smoothish ; stem 

 very branching, diffuse, pubescent ; branchlets one way ; calyx im- 

 bricate; scales oblong, scurvy, acute. 



Cya'neus, (O. b-p. Au. Q.}.) leaves linear-lanceolate, clasping, smooth ; 

 stem wand-like-panicled, very glabrous ; branches racemed ; scales 

 of the calyx lax, lanceolate, equalling the disk, inner ones coloured 

 at the apex. 34. f. Flowers many and large. This is the hand* 

 somest of all asters. 



Leave* more or less cordate and ovate, serrate, or toothed. 



Panicula'tus, (O. b-p. Au. to Nov. 7}.) leaves ovate-lanceolate, subser- 

 rate, petioied, glabrous; radical ones, ovate heart form, serrate, 

 rough, petioied; petioles naked; stem very branching, glabrous: 



