»3>4» 



ofth 



e 



^o Well 



I thofe 



V, the 

 5 con- 



'tnthe 



tulips, 

 fe firft 



feeds, 

 ;e, lefs 



erefore 

 refped 

 which 



ly up a 

 of tur- 

 in con- 



.a 



ninial 



floral- 

 fembles 



o-fletn 



1 



and the 



:h a fe- 

 fthe 



the ^P' 



TO 



3 



dvv'i 



'ith 



as 



coty 



le- 



aoo5 



Sect. IV. 4 



AND VEINS 



49 



dons of the feed, and, now rifing out of the earth, when th 



part h 



been dlfTolved 



the terreii 

 puhnonary 



fture and abforbed 



wh 



they ferve the office of an aerial 



before fcrved that of an aquatic one, or gills ; but wither and fall ofF 



as the true leaves become expanded* 



IV. I. The common foliage of deciduous plants conflitutes the 

 oro-an of refpiration already fpoken of, which belongs to the leaf-buds 

 durino- the fummer months, and drops off in the autumn, when thofe 



buds perifh by the cold, or by the natural termination of their exif- 

 tence. But there is another kind of foliage diffimilar to the former^ 

 confining of brades or floral-leaves, which fupply an organ of ref- 

 piration to the calyx and pericarp of the flower-bud. Thefe frequently 

 differ in fize, form, and colour from the other leaves of the plant, and 

 are fituated on the flower- ftalk often fo near the frudification as to be 

 confounded with the calyx. In fome plants there are two fets of floral* 

 leaves, or brakes, one at the foot of the umbel, and another beneath 



each diflind fl 

 the flower, 2 



et of 

 ell as 



and 



the flalk beneath 



they appear in a tuft above 



it, as in fritillaria impe- 

 mperial ; and in others they are fo fmall as to be termed 



ftipulse or props 



All thefe kinds of brades, or floral-leaves, ferve the oflSce of lung 



for the purpofe of expofing the vegetable blood to the influence 

 the air, and of preparing it for the fecretion, or produdion and nc 

 rilhment of the vegetable uterus, or pericarp, and of the feeds p 

 duced and retained in it, frequently before their impregnation, and 

 ways after it. 



of 



2. 



It muft be obferved that in many plants thefe' fl 



or 



braaes do not appear till after the corol and nedaries, with the anth 



and ftigmas, drop off ; th 

 as in colchicum autumna 

 trees. The production of the vegetable 



after the feed is impregnated 



croc 



ham 



nd 



fome fr 



uterus, or pericarp, with 



mpregnated feeds included in it, is, in thef? plants accompUflied 



H evolv 



cd 



