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Fragmenta phytographiæ Australiæ /contulit Ferdinandus Mueller.

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231<br />

Ptiloíus calostachyus.<br />

Arthrotrichum calostachyum, F. M. in Transact. Botan. Soc. Edinb.<br />

vii. 500.<br />

Foliis linearibus ramisque glabris, spicis conico-cylindricis tcr-<br />

minalibus solitariis, bracteis bracteolisqiie ovatis acutiusculis fere<br />

glabris trientem v. dimidium calycis a?quantibus, sepalis brevius-<br />

culis extus ápice tenus villosis, villis persubtilibus laevibus remoti-<br />

uscule nodosis, staminibus fertilibus calycem semia?quantibus,<br />

filamentis capillari-setaceis, antheris ovatis, stylo breviusculo<br />

glabro.<br />

Ad fluminis Victoria? partem siiperiorem nec non ad rivos<br />

Hooker's et Sturt's Creek ; F. M. Ad sinum Nichol's Bay ; P.<br />

"Walcott. Ad portum Roebuck-Bay ; J. Martin.<br />

Planta pulchella, tripedalis v. humilior, gracilis, erecta, pauci-<br />

ramea. Folia exceptis superioribus 1-1 J* longa, |-1'" lata. Spica?<br />

primum ¡§-1" demum 1-2" longa?. Bractea? et bracteola? deco-<br />

lores, 1-1 g"' longa?, fere enerves. Sépala pallide rosea, indumento<br />

albido permolli, interiora intus inferne barbata. Stamina basi in<br />

cyathulum fimbriolatum coalita. Anthera? flava?, i/" longa?, bilo-<br />

culares, loculis haud disjunctis. Stylus capillaris, 1"' longus.<br />

Stigma capitellatum. Germinis apex barbellatus. Fructus matu-<br />

rus ignotus. Omnes anthera? me prius examini subjecta? haud<br />

fertiles erant, quod in hac specie frequenter accidit.<br />

JPtilotus helichrysoides (Psilotrichum heliehrysoides, F. M.<br />

Fragm. i. 237) in genera quidem satis anomalus videtur, sed vix<br />

excludendus. Bractea bracteolis fere conformis. Sépala etiam<br />

interiora intus imberbia. Villi confertissimi, sat breves, remote et<br />

indistincte articulati, la?ves. Stamina calyci aequilonga v. eo<br />

dimidio breviora, glabra. Germen dense tomentosum. Stigma<br />

paulo emarginatum. Adest quoque in collectione Drummondi.<br />

Ptilotus hemisteirus (F. M. Fragm. iv. 90; Trichinium corym-<br />

bosum, Gaudich. Voy. Uran, et Phys. Bot. 444 non Sprengel ;<br />

Hemisteirus psilotrichoides, F. M. in Linna?axxv. 435) vestimento<br />

sepalorum dorsali brevi valde insignis est. Villi laeves, remote<br />

articulati. Plantam nunc ab Elder's Range, Lake Gardner, Lake<br />

Gilles, Blackwood-River, Sharks-Bay et Hammersley-Range nota-<br />

vimus, et futuro tempore e permultis locis interjacentibus obtine-<br />

bimus. Caulis interdum occurrit monocephalus.<br />

Ptilotus •rvoides (Trichinium •rvoides, F. M. Fragm. iii. 123)<br />

villis sepalorum flavidis brevissime articulatis conspicue denticu-<br />

latis ornatus est.<br />

Ptilotus helipteroides (Trichinium helipteroides, F. M. Fragm.<br />

iii. 122; T. brachytrichum, F. M. 1. c. 161) gaudet bracteis brac-<br />

teolisque enerviis, villis sepalorum breviuscule articulatis hevibus,<br />

stylo fere sesquilineari. Huic P. lepidus et P. grandiflorus proximo<br />

cognati sunt.

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