74 
INTRODUCTION TO BOTANY. 
of composition : the primary footstalk divided into secon- 
dary footstalks, and those into third-rank footstalks. 
Triternate, triternata. The primary footstalk divided 
into three, and each of these into three others; all the nine 
bearing three leaflets each. Epimedium alpinum, Crith- 
mum maritimum, Smyrnium vulgare, Actsea spicata. PL 6, 
%• 1 • 
Tripinnate, tripinnata . The common footstalk has on 
its sides secondary footstalks, and these have also on their 
sides third-rank footstalks, to the sides of which leaflets are 
attached. Daucus vulgaris, Phellandrium aquaticum, Tha- 
lictrum minus. 
The leaflets of compound leaves admit most of the 
characters of simple leaves. 
16. Expansion. 
Flat, Folia plana. Most plants. 
Convex, convexa. The upper face convex, the lower 
concave. Gey mum Basilicum majus. 
Concave, concava. The upper face concave, the lower 
convex, Drosera rotundifolia, Umbilicus pendulinus, Saxi- 
fraga oppositifolia. 
Grooved, channelled, canaliculata. Long, with a hollow 
channel throughout their whole length. Lygeum Spar- 
turn, Salsola decumbens, Pinus sylvestris. 
Keeled, carinata. Grooved, with a projection on the 
under surface the whole length, like the keel of a vessel. 
Sparganium erectum, Tragopogon pratense, Stella ria ho- 
lostea, Narcissus biflorus, Ajax fenestralis. 
Folded, plicata. Flaving several folds lengthways. Ve- 
ratrum album, Althaea officinalis, Malva sylvestris. 
Puckered, crispa. Wrinkled irregularly over the whole 
surface. Rumex crispus, Mentha crispa, Malva crispa, 
Hypericum crispum. 
Bui late, hullata. With the upper surface raised up in 
bubblelike or conical tubercles, which are hollow r ed on the 
under side. Lamium Orvalla, Qcymurn Basilicum maius. 
PI. 6, fig. 2. 
Wrinkled, rugosa . With the veins sunk in a little, so 
as to form a number of wrinkles. Salvia officinalis, Sco- 
rodonia solitaria, Marrubium vulgare. 
Waved, nndulata. The edge rising and falling alter- 
nately in roundish folds like waves. Persicaria acris, Bis- 
torta major, Jasione montana, Inula pulicaria. 
