. Lessons with plants. Suggestions for seeing and interpreting some of the common forms of vegetation. Fig. of poison sumac. 96. The Virginia creeper leaf has five leaflets,or is quinate (parts in fives). The dewberry andthe poison ivy have threeleaflets, or are ternate (partin threes). The jeffersonia(Fig. 86) has two leaflets,or is binate. Is this jef-fersonia leaf essentially pal-mate, or essentially pinnate ? 97. A leaf of the sqviirrel-corn (or dicentra) is shown,Fig. 87. It is evidentlyternate and palmate; buteach part is again divi-ded into three, and eachof these is again vario

---

. Lessons with plants. Suggestions for seeing and interpreting some of the common forms of vegetation. Fig. of poison sumac. 96. The Virginia creeper leaf has five leaflets,or is quinate (parts in fives). The dewberry andthe poison ivy have threeleaflets, or are ternate (partin threes). The jeffersonia(Fig. 86) has two leaflets,or is binate. Is this jef-fersonia leaf essentially pal-mate, or essentially pinnate ? 97. A leaf of the sqviirrel-corn (or dicentra) is shown,Fig. 87. It is evidentlyternate and palmate; buteach part is again divi-ded into three, and eachof these is again variouslydivided and cut. Theleaf, therefore, is biternate(or twice ternate). The fig. 86. Binate leaf of 90 ZHSSOJVS WITS PLANTS entire leaf is said to be decompound (a term ap-plied to all leaves in which the leaflets are com-pound ; that is, to leaves which are more thanonce compound). 98. It is plain that there is no positive or

---

Size: 1193px × 2094px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: ., bookauthorbai, bookcentury1900, bookdecade1900, booksubjectbotany