40 INEFRODUCTION TO BOTANY. 
tubercles resembling these organs, although they do not 
realiy secrete any liquid. 
1. Cellular glands, Glandule cellulares, Glandul@ excre- 
toric. Formed of cellular texture without any communi- 
cation with vessels. Nectaries of flowers. 
2. Vascular glands, Glandule vasculares, Gl. secretori, 
Gl. urceolares. Formed of cellular texture, traversed by 
vessels, Ovary of the cobza, ‘Tubercles on the petiole of 
drupacee. 
Hairs, Pili, Villi. Small, tender, hairlike appendages, 
composed of one or more cells projecting from the texture 
of the plant. 
1. Glanduliferous hairs, P2li glandulifert. Supporting 
glands on their tip. Cicer arietinum, Croton penicillatum. 
2. Excretory hairs, Pili eacretorizi. Placed on glands 
serving as excretory ducts. Urtica urens, Malpighia urens. 
3. Pili lymphatici. Not connected with any gland; seem 
mere organs of evaporation. 
Organic parts, Partes organice, Organa composita, Or- 
gana. Parts composed of the former; and generally visible. 
1. Organs of vegetation, Organa nutritiva. Necessary to 
the growth and life of the individual, as the root, stem, 
bud, and leaf 
2. Organs of reproduction, Organa reproductiva. Ne- 
cessary for the reproduction of the individual, or life of 
the species, as the flower, fruit, seeds, buds, &é. 
Organs of fructification, Organa fructificationis. Organs 
of reproduction by means of fecundation; as the. flower, 
fruit, seed. 
Organs of germination, Organa germinationis. Organs 
of reproduction without fecundation ; as germens, gongyli, 
propagines, and conidia. 
' §, Accessory organs, Organa accessoria. Not found in 
all plants, seated upon the other organs, as thorns, prickles, 
cirri. . 
3. Contained Juices. 
Sap, Alimonia, Humor, Lympha. A watery liquid newly 
absorbed, and not yet much changed by vegetation. 
Cambium. The mucilaginous juice, already changed, 
traversing the membranons texture, from which the new 
parts are formed ; is perhaps a liquid gum. 
Juice, Suécus: Any liquid that can be pressed out of a 
plant: they vary in different plants. 
