42 MEMBERS OF PLANTS. 



small globular bodies placed on the tips of hairs, as in 

 the sun dew and moss rose, or elsewhere on the sur- 

 face ; whereas animal glands are always internal. Some 

 botanists, indeed, describe internal glands, but nothing 

 precise has been ascertained respecting these, except in 

 the transparent points supposed to be glandular, in the 

 leaves of myrtle, orange, and St. John's wort. Guet- 

 tard and De Candolle describe, besides, root buds or 

 uticular glands l , as on the willow and others, filled 

 with a colourless fluid, as in the ice plant; globular, 

 such as those on the leaves of sage ; and papillary, like 

 the tasters on the human tongue, as in savory; and 

 cup-like, as in the passion-flower. 



The singular vessel which holds water in the pitcher 

 plant, may be considered perhaps as a sort of gland. 



CLASPERS AND TENDRILS. 



SEVERAL climbing plants, such as the hop, kidney 

 bean, and honeysuckle, have no peculiar instruments 

 to aid them in climbing, unless we consider as such 

 the rough reversed prickles of the hop; but many 

 plants have members admirably contrived for this pur- 

 pose. The ivy, for example, is furnished with a close 

 set row of claspers 2 (erroneously taken for roots) on 

 each side of the stem, which enables it to climb up any 

 surface tolerably rough, such as a wall or an old tree ; 

 and because it is rarely seen on a young tree, on whose 

 smooth bark it finds it difficult to climb, it has been 

 inferred that it only attacks and injures sickly trees, 

 though the fact is, that it derives all its nourishment 



(1) In Latin, Lenticellee. (2) In Latin, Tentacula. 



