ARTHRATHERUM POGONOPTILUM, Nob.
ARTHRATHERUM, Pal. Beauv. —Confer supra, p. 5o.
ARTHRATHERUM POGONOPTILUM, Nob.
Dense caespitosum; multicaule; cauliculis sterilibus nullis v. paucis. Foliis involutis, subulato-fili-
formibus, scabriusculis, secus basin intus pilosis, caetero glabris; vagina apice barbato-ciliata, csetero
glabra. Caulibus nodisque glaberrimis. Glumce valvis glabris v. sparse puberulis, incequilongis (yalva
externa breviori\ oblongo-lanceolatis, convolutione quasi subulato-acuminatis. Flore brevissime s.tipi-
tulato. Palea externa (immediatim apice cum arista articulata, delapsa arista emarginala) extus papil-
loso-scabra, marginibus glabra. Aristce [parte indivisa contorta) sub geniculo barbatce laciniis latera-
libus nudis, lacinia media plumosa subtriplo brevioribus.
Gramen rhizomate brevi obliquo ramoso subrepente crassitie calami anserini perennans. R adix e fibris (aliis in rhizomate
subsparsis, aliis ad caulium novellorum basin fasciculatis) elongatis (interdum semi-pedalibus) crassiusculis simplicibus lanu-
losis constans. C aules 1/2-i 1/2-pedales (computata inflorescentia), stricti v. geniculati, erecti, simplices, v. paree ramosi,
graciles, confertissimi, teretes, medulla fared, glabri, laevigad, obsolete striatuli, pauci-nodi, ad basin foliosi et vaginis imbri-
catis obtecd. Ardculussummus sub anthesivaginamvix superans. Internodiainferiora vaginis longiora. Nodi glaberrimi, parum
incrassad, constricd, plerumque rufescentes. F olia glaucescenda, rigidula, tenuia, plus minusve flexuosa (v. rarius stricta),
ecarinata, sub lente nervosa et extus papillulis aculeoliformibus conspersa, intus sublaevigata, ad vaginam articulata. Folia
inferiora 3-io pollices longa (modo pleraque elongata, modo pleraque brevia); summa saepissime brevia (1-2 pollices longa).
V agin« infim« aphyllae, chartaceae, Stramine«,"persistentes, subcomplicatae, striatae, glabrae, ova to-v. oblongo-lanceolatae, plerumque
acuminatse. V agin« - foliifer« rotundato-truncatse, ecarinatae, nervosae, laevigatae, apice villis albidis elongatis dense
ciliatae, ore annulo setularum brevissimarum dense barbulatae, reliquo glabrae; infimaesubchartaceae, imbricatae, plus minusve
dilatatae; superiores herbacese, folio concolores, tubuloso-involutae, arctae (v. ad nodos ramigenos demum laxae). Ligula
nulla. P anicula 3-6 pollices longa, oblonga, laxiuscula, simplex, e spiculis numerosis composita, sub anthesi forsan nutans.
R hachis filiformis, condnua, semi-teres, scabra, stricta. R amuli capillares, flexuosi, scabri, alterni, distichi, spiculas gerentes
racemosim dispositas pedicellatas plerumque 3-5, gemini v. terni (inflorescentiis macrioribus solitarii), inaequales; superiores
inferioribus gradadm brevi ores. P edicelli capillares, flexuosi, scabri, apice incrassati, plerique gluma longiores. Gluma 4 1/2-
5 lineas longa, straminea, v. stramineo et violaceo variegata, submembranacea, persistens. V alv« mudeae, inaequilongae, sub-
naviculares, trinerviae (nervis filiformibus: lateralibus secus valvae medium v. paulo aldus cum nervo medio confluendbus),
glabrae v. extus marginibusque villis brevibus conspersae, secus apicem serrulato-ciliolatae, dorso nervo medio carinulatae.
Valva externa brevior, acutata, apice plerumque fimbriolata. Yalva interna paululo aldus inserta, valva externa subtriente
angusdor et circiter 1 linea longior, basi subangustata, apice acute v. obtusiuscule emarginata, intus ad basin fiosculi alterius
rudimentum minimum lineare obtusum glaberrimum basi adnatum gerens. Flos cum sdpitulo suo et arista circiter 2 pollices
longus (prsetermissa arista vixsesquilinearis). Sdpitulus plus triplo brevior palea externa, crassus, turbinatus, dense setulosus,
apice barbato-hirsutus (villis majoribus palea externa paulo brevioribus), basi subulato-acutatus. P alea externa (generis more
tubuloso-involuta, tenuiter trinervia, chartacea, ecarinata, demum rigida subcoriacea) oblonga, glabra, cinerea v. atro-vio-
lacea, longe aristata, extus papilloso-scabra (praesertim a medio ad apicem), delapsa arista apice obtuse emarginata. A rista
decidua, violascens, setaceo-subulata, longe infra medium geniculata et trifurcata; pars indivisa gluma subaequilonga, con -
lorta, erecta, canaliculata, filiformis, papilloso-scabra, secus apicem conspicue barbato-hirsuta, easternm nuda v. laxe pilosa;
lacinite laterales capillares, nudse, scabrse, plus minusve divergentes, strictae, lacinia media triplo plusve breviores et
multo tenuiores; lacinia media stricta, longe plumosa, basi setaceo-filiformis, supeme capillaris. Palea interna (generis more
minima, membranacea, hyalina, enervia, involuta, ecarinata, glaberrima) cuneato-obovata, apice truucato v. rotundato obsolete
crenulata. Squamul.e-hypogyna; geminae, submembranaceae, glaberrimae, striatulae, oblique ovatas, obtusse, ovario sub
anthesi dimidio longiores. Stamina 3|, supra basin sdpituli pistilligeri inserta. F ilamenta capillaria. A nther« lutescentes,
glabrae, lineares, elongatae, basi et apice eraarginatae. O varium stipitulatum, obovatum, glaberrimum, sub anthesi minimum.
Stigmata 2, terminalia, elongata (paleam externam subaequanda), filiformia, efloris latere emergentia, dense plumosa (pilis
simplicibus, sub lente denticulads), basi nuda. FaucTusnon suppedit. [Exam. s. sp.)