STEMS. IS 



16. FLEXIJOTJS, (Jlexnosus] zigzag ; forming angles 

 from right to left and from left to right. 



17. JOINTED, (articidatus) as in the Prickly Pear, 

 Cactus. 



IV. Shape. 



1. ROUND, (feres) cylindrical. 



2. HALF-CYLINDRIC, (semiteres) round on one side 

 and flat on the other. 



3. COMPRESSED, (compressus) more or less flattened 

 on the sides. Ex. Poa compressa. 



4. TWO-EDGED, (anceps.} Ex. Sisyrinchium an- 

 ceps. 



The term ANGUINE, comprehends the following. 



5. TRIANGULAR, (triangularis) having three edges. 

 Ex. Cactus triangnlaris. 



6. THREE-SIDED, (triqueter) having three fiat sides. 



7. FOUR-CORNERED, (tetragonns or quadrangulans) 

 square. Ex. Balm. 



8. FIVE-SIDED, (pcntagonus or qwnquangularis) 

 having five angles and five sides. 



Observation. When the number of angles is either variable or 

 more than five, it is usual merely to describe the stem as (angulo* 

 sus) angular, except where the precise number makes a specific 

 difference, as in the genus Cartu*. Smith. 



V. Clothing. 



1. NAKED, (nudns) entire nakedness, destitute of 

 leaves, hair, prickles, &c. 



2. LEAFLESS, (aphyttus) without leaves. Ex. Cactus. 



3. SCALY, (sguatnosus) having scales. Ex. Beech- 

 drops, Orobanche. 



4. IMBRICATED, (iinbrtcatns) covered with scales, 

 so that the stem does not appear. Ex. Sempcrd-piim, 

 Houseleek, 



5. WINGED, (alatus) furnished longitudinally with 

 a membrane which is commonly a prolongation of the 

 hase of the leaves. Ex. Thistle. 



