FREE BOOKS

Author's List




PREV.   NEXT  
|<   46   47   48   49   50   51   52   53   54   55   56   57   58   59   60   61   62   63   64   65   66   67   68   69   70  
71   72   73   74   75   76   77   78   79   80   81   82   83   84   85   86   87   88   89   90   91   92   93   94   95   >>   >|  
n those in the upper and at the junction with the sheath the blade is narrow, just as broad or less than the sheath, and becomes broader about the middle; the length varies from 6 to 10 inches generally, also to 14 inches, and breadth at base 1/4 inch and at the middle 5/16 inch; the upper leaf-blade is generally shorter, varying from 5 to 10 inches and very broad at the base near the sheath, about 7/16 inch and gets gradually narrow upwards. It is convolute when young. The _inflorescence_ is a compound spike varying in length from 4 to 8 inches, contracted and pyramidal and always erect; the main rachis is stout, angled with very minute hairs on the ridges and with a tuft of bristly hairs and also tubercle-based hairs at the place of insertion of the spikes. _Spikes_ are many (up to 16 or rarely more), simple or branched, the lower ones longer, but getting gradually shorter upwards, and varying in length from 1/2 to 2 inches. The rachis of the spike is angular, with scattered tubercle-based bristly hairs. [Illustration: Fig. 87.--Panicum Crus-galli. 1 and 2. Front and back views of spike; 3. spikelet; 4 and 5. first and second glumes; 6 and 7. third glume and its palea; 8. fourth glume, front and back view; 9. ovary, anthers and lodicules.] The _spikelets_ are turgid, densely packed on one side of the rachis in three to five rows, sessile or subsessile, sub-globose or ovoid, with unequal tubercle-based bristly hairs on the nerves of the glumes and with short minute hairs on the outer surface of the glumes, 1/12 to 1/8 inch; awn 1/4 inch to 5/16 inch. There are four _glumes_. The _first glume_ is 1/3 to 1/2 of the third glume, suborbicular, abruptly acuminate or rarely mucronate and 5-nerved (very rarely 5- to 7-nerved), clasping at base and margins thinly ciliolate. The _second glume_ is ovate oblong, short, awned and 5-nerved; sometimes with partial nerves at the apex between the central and the lateral nerves, and then 5- to 7- or 5- to 9-nerved, hispidly hairy on the nerves, margins ciliolate. The _third glume_ is as long as the second, ovate-oblong and the apex abruptly ending in a stout scabrid nerved awn, varying in length from 1/4 to 3/8 inch, rarely 1 inch; 5- to 7-nerved (two partial at tip), paleate and sometimes with three stamens; _palea_ is hyaline, ovate-oblong with infolded margins. The _fourth glume_ is smooth, shining, broadly oblong, faintly 5-nerved, apex rounded or cuspidate with a few cil
PREV.   NEXT  
|<   46   47   48   49   50   51   52   53   54   55   56   57   58   59   60   61   62   63   64   65   66   67   68   69   70  
71   72   73   74   75   76   77   78   79   80   81   82   83   84   85   86   87   88   89   90   91   92   93   94   95   >>   >|  



Top keywords:
nerved
 
inches
 
glumes
 

nerves

 

rarely

 
oblong
 
varying
 

length

 

bristly

 

rachis


margins

 
sheath
 

tubercle

 

narrow

 
shorter
 

middle

 

abruptly

 

ciliolate

 

partial

 

minute


fourth

 

upwards

 

gradually

 

generally

 

unequal

 
packed
 
densely
 

surface

 
globose
 

cuspidate


hyaline

 

subsessile

 

sessile

 

clasping

 

faintly

 
hispidly
 

turgid

 

central

 

lateral

 

broadly


shining

 

scabrid

 
ending
 

smooth

 

acuminate

 
mucronate
 
suborbicular
 

stamens

 

paleate

 
rounded