44 



Variat: majus: culmo bipedali, subsimplici, pennae anserin£e crassitio, foliis latis, panicula ramosissinia, 

 apice 2 — 4 uncias lata. 

 lu insula Indefatigable. 

 minus: culmo vix pedali, a basi ramosissimo, tenui, foliis vix semiunciani latis, vaginis multo 

 densius et scabrius strigosis, panicula anguste contracta subrara, spiculis Ifetius viri- 

 dibus basi flavescentibus. 



Hab. in insulis Chatham et Charles. 

 glabrescens : vaginis pilis tantum paucis derelictis glabriusculis, foliis obscurius coloratis, spi- 

 culis (in duabus prfficedentibus formis mox caducis) diutius persistentibus et paniculam 

 densiorem efficientibus. 



In insula Chatham. {Ands. 1. c. p. 135). 



60. P. FUSCUM Sw. Prodrom. fl. iiid. p. 23, fl. ind. occ. I, 156. Kth. Agr. p. 94. Stevd. 

 Synops. p. 67, n. 412 (excl. var.) 



Ut certius a sequente, quocum sjepius confusum, distinguatur characteres specierum exponamus. 



Gramen crespitose crescens. Culmus 1 — 2-pedalis, inferne repente-adscendens , geniculatus, ibique 

 valde ramosus, glaber, teres; nodi angusti, fusci, nudi. Folia basi latiora rotundata, lanceolata, strida, 

 utrinque glabra plana, la3te viridia, ad summum 4 pollices longa, vix semipollicem lata, longe acutata, 

 erecta; vaginje glabr;e, foliis vix breviores, inferne pallidiores, superne ampliores, margine extimo scabrre; 

 ligula brevissima, truncata, ciliata. Panicula simplex; rachis angulata, angulis scabriusculis; rami indivisi 

 alterni, superiores interdum suboppositi, angulati, quam racliis scabriores, pollicares, arrecti vel subpatentes; 

 pedicelli sajpius gemini inaequales, non clavati, angulati, pilis nullis ciliati sed scabri. Spiculae similineam 

 longEe, ad medium latiores acutse, obscure virides sen brunnescentes; glumse 2: exteriör superiorem vix ad 

 medium attingens, latissime ovata, triplinervia, spiculam basi involvens, pallida; superior bruunescens, ovata, 

 7-nervia, inter nervös transversim rugulosa. Palea flosculi sterilis glumse superioi'i similis. Paleae fl. fer- 

 tilis eburneaj minute granulatis. 



Sub triplici occurrit forma: 



vegctius: pallide virens, culmo basi adscendente, diftuse ramosissimo, interdum bipedali; ramis panicul» 

 pyramidalis angulatim divaricatis; spiculis pallide ferrugineis. 

 Haec forma est typica locis valde graminosis läste vegetans. 

 Jirmius: obscm^e viridis; culmo pedali rigido, ramis et foliis strictissimis; ramis paniculan elongatje 

 subadpressis; spiculis saturatius brunnescentibus. 



IIkc ad sequentem propius accedit, sed abunde differt foliis multo angustioribus, pedicellis 

 omnino glabris, spiculis medio latioribus et minoribus, paleis minus acute nervosis nec apice 

 distinctius infuscatis. 

 pubescetis: foliis vaginisque pilosis. 

 Forma admodum rara. 



Hab. locis graminosis regionis inferioris et medite ins. Chatham et Charles (Ipse). 



61. P. FASCicuLATUM Swavt: Prodrom. fl. ind. occ. I, p. 145. Kth. Agr. p. 94. Steud. 



Synops. p. 80 n. 558 et p. 67 n. 412 var. 



Gramen magis solitarie crescens. Culmus 2 — 3-pedalis, basi sub-geniculatus, ceterum stricte erectus, 

 teres, foliosus, glaber, stramineus, penna passerina crassior; nodi swpius obtecti, angusti, pilis parcis pilosi. 

 Folia erecta, semipedalia et ultra, fere pollicem lata, plana, margine scabro subundulata, saturate viridia, 

 nervis et costa longitudinaliter striata, longissime acuminato-cuspidata, utrinque glabra; vaginse foliorum 

 longitudine angulatas, glaberrimpe, margine tamen subvillos£e, adpressre; ligula in pilos soluta. Panicula fa- 

 stigiato-ramosa, digitalis et ultra; rhachis angulata, scabra; rami simplices, inferne semiverticillati, deinde 

 oppositi, ultimi alterni sed appropinquati, longiores 3-pollicares, angulo plerumque 30" arrecti, acute angu- 

 lati, aculeolis crebris scaberrima; pedicelli inwquales, apice non incrassati etiam angulati scabri et pilis pa- 

 ucis sat longis basi ciliati. Spicula) pyriformes, supra medium latiores, fere lineam longre, fusco-brunne- 



