INDEX 



Paniceae 12, 19, 149 

 PANICLE: a much-branched 



inflorescence, bearing 



spikelets on pedicels. 4 

 Pcnicoideae 12, 149 

 Ponicum 165 



agrostoides 175 



onceps 175 



arizonicum 170 



ashei 169 



boscii 167 



brachyonthum 170 



copiilare 173 



clandestinum 167 



columbianum 169, 166 



condensum 175 



depauperatum 165 



dichotomiflorum 174 



dichotomum 168 



fosciculatum 171 



var. reticulatum 171 



hemitomon 172 



implicatum 166 



latifolium 167 



lindheimeri 165 



meridionale 169 



microcarpon 168 



miliaceum 173 



obtusum 171 



polyanthes 168 



rhizomatum 175 



scoparium 166 



scribnerianum 167 



sphaerocarpon 168 



texanum 170 



verrucosum 170 



virgatum 174 

 Pappophorum 23 



wrightii 23 

 Pappus grass 23 

 Paspalum 159 



debile 160 



dilatatum 161 



dissectum 159 



distichum 160 



floridanum 162 



laeve 162 



var. circulare 162 



pubescens 161 



setaceum 160 



urvillei 161 

 Peanut grass 164 

 Pearl millet 150 

 PEDICEL: the stalk of a 



single spikelet. 5 



Fig. 372 



Figure 372 



PEDUNCLE: the stalk 



inflorescence. 5 

 Pennisetum 20, 150 



glaucum 150 



ruppelii 150 



setaceum 1 50 



of an 



PETIOLE: a leaf stalk (ab- 

 sent in most grasses ex- 

 cept bamboos). 

 Phalarideae 11, 22, 144 

 Phalaris 144 



arundinacea 144 



canariensis 144 

 Phleum 1 12 



alpinum 1 1 2 



pretense 1 1 2 

 Phragmites 24 



communis 24 

 Pine dropseed 1 26 

 Pinegrass 73, 1 1 3 

 Pinyon ricegrass 1 1 1 

 Piptochaetium 1 1 1 



fimbriatum 1 1 1 

 Plains bluegrass 76 

 Plains foxtail 154 

 Poa 75 



alsodes 80 



annua 82 



arachnifera 17, 77 



arida 76 



autumnalis 81 



compressa 75 



cusickii 83 



cuspidate 77 



epilis 84 



fendleriana 82 



glaucifoiia 76 



interior 79 



macrantha 77 



nervosa 76 



nevadensis 83 



palustris 79 



pratensis 78 



scabrella 81 



sylvestris 80 



trivialis 79 

 Polypogon 103 



monspeliensis 103 

 Porcupine grass 109 

 Poverty oatgrass 100 

 Prairie cup grass 155 

 Prairie dropseed 127 

 Prince Edward Island 



bent 1 1 6 

 PROPHYLLUM: the mem- 

 branous structure found 



between the main stem 



and the base of a branch. 



3 Fig. 373 



Puccinellia 58 



a:roides 58 



distans 58 



fasciculata 58 



nuttalliana 58 

 PULVINUS: a swelling at the 



bases of branches of an 



inflorescence. 5 

 Purple lovegrass 36 

 Purpletop 29 



Quackgrass 88 

 Quaking grass 45 



Rabbitfoot grass 103 



RACEME: an unbranched in- 

 florescence, bearing spike- 

 lets on pedicels which are 

 attached to the central 

 axis. 5 Fig. 374 



Figure 374 



RACHILLA: the central stalk 

 of a spikelet, which bears 

 the florets. 5, Fig. 375 



Figure 373 



Proso millet 173 

 Pseudosasa 1 5 

 japonica 15 



Figure 375 



190 



