Neue Gräser aus Brasilien. 75 



i). Stipa tenuiculmis Hack. n. sp. 



Perenn'ts. lilnzomo hrevitcr re^iens, }ion stolomfenim, innova- 

 tiones omnes extravaginales hasi incrassatae. Culmi erecti circa 70 cm 

 alfi pro altitudine graciUimi (diam. in parte inf. circa O'Sfmn), teretes 

 glaherriml 2 — 3-nodes nodo superiore circa in cidmo medio sito, sini- 

 plices. Vaginae teretiusculae arctae, apice altero margine ciliolatae 

 ceterum glaherrimae. Ligida margo memhranaceus angustus. Laminae 

 anguste lineares tenui-acuniinatae saepkis convolutae suhjunceae 

 (diam. O'S mm), rarius inferiores planiuscidae, 1'5 mm latae, suhtus 

 scahrae supra laeves ihique nervis crassis suhcontiguis percursae, 

 erectae virides 10— 30 cm longae. Fanicidalanceolata paupera sid)- 

 contracta laxa circa 10 cm longa, ramis solitariis v. hinis cum rliachi 

 scaheruUs tenui-fdiformihus, primaria infimo dimidiam paniculam sub- 

 aequante secundarhim hasilarem v. siiperius enatum edente, 1 — 2-spi- 

 cidaiis, spicidis longiuscide pedicellatis. Spiculae Uneari-lanceolatae, 

 18 — 20 mm longae, dllute violascentes. Glumae steriles inaequales, 

 I. major, circa 19 mm, II. 15 mm longa, utraque linear i-lanceolata 

 aciitissima, 3-nervis, laevis. Gluma fertilis 9 — 10 mm longa, lan- 

 ceolata, hasi in callum pungentem curvulum 2'5 mm longum, hreviter 

 harhatum constricta apice parum attenuata Jiaud coronidata nee 

 cdiolata, cum arista iarde articidata hasi et secus nervös (5) ad 

 medium vel ad -js usque appresse puhescens (pilis ut Uli calli gil- 

 vescentihus) , ceterum scahriuscula, demum alho-viridula; aristae ad 

 6 cm longae, subrohustae columna circa 35 cm longa, glahra sca- 

 herida, suhula in ^/^ inferiore suhgenictdata scahra. Palea circa 

 1 mm longa, ovata. 



Rio Grande do Sul: in campis propre Lagäo, Municipio Sole- 

 dade, Dec. 1910, leg. C. Jürgens. 



Verwandt mit St. fdicidniis Del, deren Deckspelze aber nur 

 am Callus behaart, sonst kahl ist, während bei unserer Art 5 un- 

 gleich lange Haarleisten längs der Nerven verlaufen. 



7. Trisetum (?) Jürgensii Hack. n. sp. 



Perenne. Cidmi erecti ad 70 cm alti, suhrohusti teretes superne 

 scahri circ. 6-nodes simplices vel ramulo hrevi foliifero aucti. Vaginae 

 internodiis hreviores teretes laxiuscidae scahendae. Ligida ovata 

 ohtusa, 2 — 3 mm longa, dorso mimde Järiula. Laminae pro altitudine 

 plantae hreves (4—5 cm longae), circa 15 mm latae, siccando laxe in- 



