TERMINOLOGY. | S* 
i. Flat; (planum), when the thin membrane fies 
flat upon the seeds, as in Polypedium. 
2. Peltated, (peltatum), when this thin membrane 
is circular; and below, in the middle, is attached to 
the seeds by a small thread. 
3 Horn-like, (corniculatum), when this thin mem- 
br ane is cylindrical and hollow, and incloses the 
flowers and seeds, asin Equisetum. In fig. 11, there 
are four of these horn-like indusia to be Kise evell * 
| § 4. 
The 1 TENDRIL, (cirrhus), 1s a thread-like body, 
which serves for attaching plants to some support. 
Climbing plants, (vegetabilia scandentia), are furnish- 
ed with these. ‘They are in general spiral, as in the 
Vine, Vitis vinifera, fig. 27. The species are as fol- 
lows ; 
1. Axillary, (axdllares), when they rise from the 
axilla of the leaves, fig. 27. 
2; Foliar, (foliares), when they spring out of the 
points of the leaves. 
3. Petiolar, ( petiolares), when the cirrhi stand on 
the point of the common foot-stalk of a compound 
leat. 
4, Peduncular, ( pedunculares), when they rise out 
of the foot-stalk of the flower. 
5. Simple, (simplex), when a cirrhus is not divid- 
ed. earn | 
* The celebrated Dr. Smith of London has well distin« 
guished the genera of the Filices by aN way in which the in- 
dustum bursts. 
4 6. Two, 
