234 



c. — A similar spike with the leaf removed, showing prophylla, x. 

 d, — A two- flowered $ spike. 



e. — A similar spike, the lower portion in lonj:j;iludinal section, showing grain cavities. 

 y. — A section of the lower part of a $ spike, made in the same plane as the glume, 



showing grain, etc. 

 g, — Grain witli a portion of the style. 



h^ /, k, — Transverse sections of the spike across a <^pikclet, showing the grain witliin. 

 /, ni, — Transverse sections of the grain, /, includes llie emI)ryo. 

 ;?. — Free apex of the glumes. 



0, — Staminatc spikclct, ' . 



/. — -rioret of same. 

 r, — Flowering glume of 5 tloret expanded. 



J. — A stamen. 



L 



A — A portion of the stem and a branch with a prophyllum, x. 

 u, — Transve^e section of the culm. 



r I 



V. — Transverse section of a leaf. * 

 Tf', — Figure showing the ligule. 



Plate CVTI. 



H. — A plant of Penfarrlial'his Founiicrana^ somewhat reduced. 

 b\ l> . — First empty glumes of the two spikelets, moistened and membranous mar- 

 gins pressed out, 



(/.—Second empty glume. 



f I, — Flowering glume of the first floret. 



r.— Palea of same. 



i\ — Bifid rudiment of the third spikelet. 



K. — Pistil with lodicules with scale of enlargement indicated. 



L. — Lodicules spread out. 



Plate CVITf. 



A. — Spike or cluster of spikelets with portion of main rliachis, r, 



C.— Chistcrof spikelets spread apart to expose the bristle-likc lower glumes, /', /', 



and bifid rudiment, <■". 

 W, — Cluster (if spikelets in which the second spikelet is reduced nearly to the form of 



the bristles. 

 c, — AnteHrn- view of the pedlcellati' second fioret, showing the prolongation of tlie 



rhaclulla, f. 

 Ttv. — Cluster of spikelets of Pctitarrhaphis srahra^ the florets separated from the 

 empty glumes and bristles. 



V. — Kirsl lloret of same. 



«. — Second lloret of same, showing prglongation of rhachilla, f. 



X. — Cluster of spikelets of Fentarrha^his paupercuht {^PolyscJnsiis paiipcrcula^ Prcsl), 



X'. — Second lloret of same, showing the pilose pedicel. 



All of plates CV, CN'I and CVI I, and figures A, 11, C and ^'of plate C\'III origi- 

 nal. Figures //, v and 7<*, redrawn from Kuntli ; figures X and X', redrawn from 



Presl. 



