parted leaf dentate leaf venation rosette blade leaf form parallel-veined leaf leaf blade plant organ leaf shape scale leaf erose leaf lobed leaf runcinate leaf sporophyll cataphyll floral leaf scale lobe leaflet verdure serrate leaf sporophyl pad entire leaf fig leaf dandelion green amplexicaul leaf compound leaf simple leaf pitcher prickly-edged leaf crenate leaf parenchyma emarginate leaf frond greenery leaf foliage