2g Gramineae Jss. 



decidim, e media bractea summa lateraliter exserta ; pilis sub- 

 verticillatis patentibus apprcssis serrulatis acuminatis, e ser- 

 raturis adnatis subangulatis ; fructus antice sulcatus, inde- 

 hiscens, compressus oblongus, bracteam summam subaequans 

 et ab hac cum collateralibus inclusus et cum tota spicula 

 deciduus, candidus glaber lucidulus, stylorum rudimentis per- 

 sistentibus coronatus, semiadnatus ; semen^ conforme albumino- 

 sum ; emhryo lateralis ad sulcum positus erectus ; alhumen 

 farinosum e granulis subglobosis minutis, tinctura Jodii ope 

 caeruleis constans copiosum candidum. — MenseMartio 1846. 



11. AGROSTIS SCABERRIMA Hsskl. 



Char. Gcn. cf. Knth. En. I. 217. Endl. Gen. 810. a. Msn. Gen. 419. Comm. 

 321. 99; bracteae infimae vaciiae autem inaequales et summa mutica! 



Char. Spec. Diagn.: Repens, ramis fertilibus adscendentibus, foliis planis 

 utrinque et vaginis scaberrimis, lingula brevi truncata ciliata, pani- 

 cula simplici brevi patenti ; bracteis infimis vacuis inaequalibus, iri- 

 feriore acuminata 9-nervia hispido-scabra, florem superantibus, summa 

 et collateralibus connatis muticis, hisce minimis. — Affin, A. pulchellae 

 Knth. En. I. 223. 38. — Habitu magnopere accedit ad A. vulgarem 

 With. Knth. 1. c.220. 18. — A. stoloniferam L. Knth. 1. c. 219. 12, quae 

 differt autem bracteis infimis aequalibus , floribusque congestis ; et 

 Deyeuxiam (Agrostis R. Br.) Knth. 1. c. 245.39., quae diflert: spiculis 

 bifloris, bracteae summae arista et bracteolarum basi externa barbata ! 



Descrpt. Herbae perennes in stagnantibus prope Ba- 



taviam longissime prorepentes, apice geniculatim adscenden- 



tes; pars emersa 6 — 8 poU. longa; caulis anceps glaberrimus 



lucidus, ad nodos pilis albidis retrorsis hirtus; internodia 



inferiora 2,0 — 2,5 poll. longa, partis adscendentis vix 1,0 poU. 



excedentia, summum elongatum 3 — 5 poll. longum; vaginae 



complanatae subcarinatae 1,5 — 2,0 poll. longae, 0,15 poll. latae 



pilis retrorsis minimis, praeprimis in carina scabrae ; lingula 



brevis truncata ciliata; folia patentia subdisticha glauca li- 



neari-lanceolata acuminata 1,5 — 2,0 poll. lata, supra antrorsum, 



subtus retrorsum scabra, in margine cartilagineo spinuloso-ser- 



rata; panicula brevis patens ovata, 2 poU. alta et basi lata; 



rami alterni simplices flexuosi, inferiorcs spiculas6— 7, supe- 



riores 3 — 4 alternas distantes ramo adpressas gerentes, anci- 



pites utrinque margine cartilagineo spinuloso-serrato scabri; 



