SUR, Fe N N Ta en ra. 
F h RA AGE Ka SE Da ie 
V. 
Gramineae nonnullae austro-americanae. 
Von | 
R. Pilger. 
Schizachyrium Weberbaueri Pilger n. sp. — Perennis, rhizoma 
parum elongatum, culmos complures aggregatos et innovationes intra- 
vaginales precreans; culmi ad ceirc. 80 cm alti, plurinodes, internodia ° 
inferiora brevia, superiora eirc. 10—12 cm longa; folia glaucescentia, 
lamina anguste linaris, ad medianum complicata, acuta, ad 20—25 cm 
longa, ad 3—3,5 mm (expansa) lata, versus apicem scabra, ad basin 
margine pilis nonnullis longis rigidis ornata, ceterum glabra, vagina 
compressa glabra, ligula membranacea, 2 mm longa; culmus superne 
parum laxe distanter florifero-ramosus, ramis erectis, racemi basi 
vaginis supremis angustis spathiformibus eircumdati veldemum longius 
exserti; racemi in specimine ubique maxima pro parte delapsi; artieuli . 
angusti, compressi, superne anguste celavatim dilatati, appendice cupuli- 
formi obliquo, lacerulato, 1,5 mm longo instructi, utroque margine et 
dorso satis parce albido- pilosi (pilis ad !/, articuli aequantibus), 5—7 mm 
(sine appendice) longi; spiculae sessilis gluma prima firma, lance- 
olata, e nervis lateralibus breviter bidentata, marginibus anguste 
inflexa, dorso plana, 8—9 mm longa, dorso satis longe parce albido- 
hirsuto-pilosa, nervis lateralibus 2 percurrentibus, praeterea nervis 
4 brevioribus, callo 1 mm longo, obtuso, inaequaliter albido-barbato, 
gluma secunda eymbiformi, carinata, late lanceolata, marginibustenera, 
8—9 mm longa, mediano percurrente, nervis lateralibus 2 tenuissimis 
brevioribus, gluma tertia tenerrima ovalis, obtusa, subtiliter 2-nervia, 
gluma quarta tenerrima, lanceolata, fere ad basin divisa, inter lobos - 
aristata, arista 16—20 mm longa, laxe torta; spicula pedicellata 
tabescens, pedicellus compressus, erectus, 1 mm latus, superne parum 
dilatatus, 5 mm longus, utroque margine satis parce albido-pilosus, 
dorso brevius pilosus, gluma prima aristato-acutata, 4 mm longa, 
secunda inclusa brevis. be 
