A species with the habit and in part the appearance of A. palustris

108
Mededeelingen ' s R y k s Herbarium Leiden:
A species with the habit and in part the appearance of A. palustris
(Chapm.) Vasey, but with a very distinct type of inflorescence.
Note: = Aristida condensata Chapm. var. Combsii (Scribn. et
Ball) Henr..
A fragment of the type in the U. S. Nat. Herbarium was kindly
sent by Prof. A . S. HITCHCOCK. The spikelets agree perfectly with
CHAPMAN'S A. condensata b u t the lower sheaths are glabrous.
Aristida compacta Andersson.
NILS JOHAN ANDERSSON; Enumeratio plantarum in Insulis Galapagensibus hucusque observatarum, in Kongl. Svenska Fregatten
Eugenies Resa omkring jorden, under befal af C. A. Virgin, àren
1851—53, utgifna af K. Svenska Vetensk-Akademien, Stockholm,
[1861] Botanik. 2. p. 50!*)
Panicula 3—4-pollicari, spicatim contracta, oblongo-cylindracea,
ramis a basi spicatis, brevissimis, divisis ; glumis apice erosis v. bifidis,
aristatis, inferiori breviori ; flosculo glabriusculo, apice cum arista
persistente articulate, infra aristam quater torto, setis nudis divaricatis
subaequalibus, media subunciali. — A. 1. c. p. 145.
Hab. locis siccissimis admodum elevatis ins. Albemarle (Ipse).
Radix hbris longissime pubescentibus fasciculata. Culmi semipedales,
dense caespitosi, decumbentes, articulo ultimo geniculatim erecto,
tenues, glaberrimi, nitentes, infra nodos angustos atros scabriusculi.
Folia rigida, convoluto-filiformia, subpungentia. l ^ lin. lata, subtus
glaberrima, in nervis scabre et densissime puberula; vaginae i n t e r nodiis breviores, clausae, valide striatae, glabrae; ligulae loco pili
longi albi. Panicula flavescens, vagina basi inclusa, spiciformi-contracta,
densa, cylindracea, 3—4-pollicaris, obtusa; spiculae subsessiles, quam
in prioribus majores; glumae latiores, hyalinae, nervo unico (saltern
in gluma inferiori) hispido carinatae, inferior apice subtruncata,
arista gluma duplo breviore armata, superior inferiori evidenter longior,
apice bifida, ex emarginatura aristata. Flosculus glumam inferiorem
aequans, pedicello valde barbato insidens, scabriusculus vel punctu1
*) The Aristidas from the Galapagos Islands were already mentioned by ANDERSSON
in his work: Om Galapagos-Oarnes Vegetation in Kongl. Svenska Vet. Akad.Handl.
1853. Stockholm [1854] p. 143—145.