XXX 
BOTANICAL TERMS AND DEFINITIONS. 
and varies in consistence from a soft silky down to stiff 
hard bristles ; its use in some plants, appears to be to 
serve as a protection from insects and vicissitudes of 
weather; in some plants the hairs or bristles are tubulaV 
and pervious, and serve the office of excretory ducts, each 
individual hair having a small foUicle or bag situated at the 
base and containing a fluid; which in some plants is 
poisonous, as in the nettle. 
Hairy, (^Hirsutus vel Pilosus) stems or leaves covered with hair 
are so called. 
Halbert-SHAPED, {Hastatum) applied to leaves hollowed out at 
the base and sides, but with spreading lobes : example, the 
upper leaves of the Solanum Dulcamara. 
Hatchet-shaped, (Dolabriforme) applied to leaves cylindrical 
at the base and having the upper part dilated, thick on one 
edge and cutting on the other. 
Head, or Tutt, vide Capitate. 
Heart-shaped, {Cordatum) applied to leaves resembhng an oval, 
with the base deeply hollowed out; or having the exact 
form of a heart, as it is usually represented. 
Hirsute, vide Hairy. 
Hilum, vide Eye. 
Hispid, {Hispidus) Hairy. 
Hoary, {Incanus) leaves and stems are so called, when the surface 
is clothed with silky hairs, or a scaly mealiness of a whitish 
or grey colour. 
Hollow, or Tubular, (Tubulosum) applied to leaves hollow 
within : example, the common onion. 
Hooded, vide Culullate. 
Horizontal, {Horizontale) applied to leaves spreading and form- 
ing a right angle with the stem ; also to flowers, making a 
right angle with the stem ; and to roots which, instead of 
descending in a perpendicular direction, spread horizon- 
tally. 
Husk, vide Glume. 
Hypocrateriformis, vide Salver-shaped. 
Imbricated, {Imhricatum) applied to leaves, when lying one over 
the other like tiles upon a house ; applied also to the 
leaves of the calyx when lying one over the other. 
Incanus, vide Hoary. 
Indigenous, {Indigence) plants the natural produce of any parti- 
cular country, are said to be iadigenous to that country. 
