COROLLA. 49 



Observation, The spathe sometimes encloses a Spadix or elon* 

 gated receptacle common to many flowers. PI. 13, fig 1 . 5, a. & b. 

 Ex. Indian Turnip, Arum, 



5. GLUME, (gluma.} Husk. PL 13, fig. 7. The 

 calyx of the grasses, and grass-like plants of a chaffy 

 texture. 



Each separate piece of the glume is termed a valve. 



Observation. 1. To the glume belongs the A.wx t (arista) beard; a 

 bristle-shaped appendage, usually spiral or twisted, and possess- 

 ing the property of being moved by moisture. This is what gives 

 motion to what is called the animated oat. 



2 The corolla of grasses is precisely of the same husky nature 

 of their calyx, and is by some botanists considered as such. 



6. CALYPTRA, (calyptra.} PI. 13, fig. 8. The ca- 

 lyx of the mosses, which is placed overtime unripe fruit 

 like an extinguisher upon a candle, but is soon torn 

 from its base and elevated along with the ripening cap- 

 sule. 



Observation, Sir J. E. Smith considers it a species of corolla. 

 The same author makes another species of calyx, Perich.'tium, 

 a scaly sheath investing the fertile flower, and consequently the 

 base of the fruit-stalk in some mosses. 



7. VOLVA, Ootw.) PI. 2, fig. 9. b. Wrapper or 

 covering of the Fungus tribe. It first envelops the head 

 of the Fungus* afterwards bursts and appears in a lacer- 

 ated form about the trunk. 



II. Corolla. 



THE COROLLA. PI. 12, fig. 1,a. a. a. Com- 

 monly called the flower-leaves, consists of those more 

 delicate and dilated, generally more coloured leaves, 

 \vhich are always internal with respect to the calyx, 

 and constitute the chief heauty of the flower. Ex. In 

 the Rose the corolla is red and fragrant ; in the Vio- 

 let, purple ; in tlrc Primrose, yellow. 



The term corolla includes two parts, tho PETAI, 

 (petalum) and the NECTARY, (nectarium^ The Nec- 

 tary is to he treated of in a separate section. 

 5 



