INTRODUCTION TO BOTANY. xxxi 



is, terminated with an odd one, or single leaflet ; for ex- 

 ample, elder, rose, &c. See Plate, 77, 80, S-i. 4. abruptly 

 winged, that is, not terminated by a leaflet or tendril. See 

 Plate, 79. 5. oppositely tsjznged, that is, having the leaflets 

 placed over against each other in pairs. See Plate, 79. 6. 

 alternately winged, that is, having the leaflets alternate, along 

 the common leaf-stalk. See Plate, 80. 7. interruptedly 

 winged, that is, having smaller leaflets interposed between the 

 principal ones; for example, silver-weed, (potentilla anserina,) 

 dropxmrt, (spiraea filipendula.) 8. winged, running down the 

 stem, (decursively winged,) that is, when the leaflets run into 

 one another alonij the common leaf-stalk. 9. twice-xvinsed, or 

 doubly winged, (bipinnate,) that is, when the common leaf- 

 stalk has winged leaves on each side of it. See Plate, 83. 

 10. doubly ternate, or doubly three-leaved, (biternate,) that is, 

 when a leaf-stalk has three ternate leaves, that is, three leaflets 

 of three, or nine leaflets ; for example, gout-weed, (eegopo- 

 dium podagraria,) any one of the clusters of all the nine 

 leaflets in Plate, 170. 11. a triply-three-f old-leaf, or thrice- 

 ternate, that is, when a leaf-stalk has three, doubly ternate 

 leaves, or three times nine leaflets, or twenty-seven leaflets, in 

 three groups of nine leaflets in each; for example, yellow 

 fumitory, (fumaria lutea.) Plate, 170. 12. bird-footed, 

 (pedate,) leaf, that is, a leaf divided into three, with its side 

 leaflets, compounded in their fore part ; for example, common 

 passion-flower, stinking hellebore, (helleborus foe'tidus.) See 

 Plate, 76. 



3. Determinate Leaves. — By the determination of leaves 

 is meant their character, derived from situation, insertion, or 

 direction. 



In respect to determination leaves may be — 



1. seed ones, (seminal,) that is, the first which appear ; ex- 

 ample, in the radish. 2. stem-leaves, (cauline.) See Plate, 

 23, 24. 3. target-shaped, (peltate,) when the leaf-stalk is 

 inserted into the disk or middle of the leaf, or nearly so ; for 

 example, nasturtium, navel-wort, (cotyledon umbilicus.) See 

 Plate, 35. 4. erect, when the angle, the}^ form with the stem 

 is very small; for example, smooth tower-mustard, (turritis 

 glabra.) 5. spreading, i. e. in a direction between upright, 



