40 
INTRODUCTION TO BOTANY. 
tubercles resembling these organs, although they do not 
really secrete any liquid. 
1. Cellular glands, Glandules cellular es, Glandules excre - 
torice. Formed of cellular texture without any communi- 
cation with vessels. Nectaries of flowers. 
2. Vascular glands, Glandules vasculares , Gl. secretorii 9 
Gl. urceolares. Formed of cellular texture, traversed by 
vessels. Ovary of the cobaea, Tubercles on the petiole of 
drupacese. 
Hairs, Pili, Villi. Small, tender, hairlike appendages, 
composed of one or more cells projecting from the texture 
of the plant. 
1. Glanduliferous hairs, Pili glanduliferi. Supporting 
glands on their tip. Cicer arietinum, Croton penicillatum. 
2. Excretory hairs, Pili excretorii. 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, Paries organices , 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, &c. 
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. 
3. Accessory organs, Organa accessor ia. 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 membranous texture, from which the new 
parts are formed ; is perhaps a liquid gum. 
Juice, Succus. Any liquid that can be pressed out of a 
plant : they vary in different plants. 
