20 OBJECT LESSONS IN BOTANY. 
elegant figure in this and in the Lilac, &c. But sometimes 
this peculiar enlargement at base becomes excessive, and the 
figures more curious than elegant. Such is the arrow-shaped 
figure, called sagittate, having long-pointed base lobes, as 
seen in the Arrow-head (Fig. 47), the Scratch Knot-grass, &e. 
(Fig. 26.) 
Fig. 23. Reniform leaf of Wild Ginger. Fig. 28, Fraser’s Magnolia: obovate- 
Fig. 24. Reniform leaf of Pennywort. spatulate, auriculate at base. 
Fig. 25. Peltate leaf of Pennywort. Fig. 29. Oblong leaf of the Toothed 
Fig. 26. Arrow-shaped leaf of Scratch Arabis, 
Knot-grass. Fig. 30. Three-lobed leaf of Liverwort. 
Fig. 27, Spatulate leat of Silene Virginica, 
20. In the common Sorrel leaf, and in Fraser’s Magnolia 
leaf (Fig. 28), these base lobes remind one of ears, and such 
leaves are said to be aurtculate (from the Latin uuricula, an 
19. Describe the cordate leaf, and give examples. The sagittate, and ex 
amples. 
20. Describe the auriculate form, and give examples. The reniform, 
Examples. 
