147 
Characters of some GNAPHALIOID COMPOSITÆ of the Division ANGI- 
ANTHEZÆ ; by Asa GRAY. 
(Continued from p. 102.) 
SKIRROPHORUS, DC. (Skirrophorus et Pogonolepis, Séeeéz. 
Eriocladium, Lindl.) 
Char. Reform. Capitula biflora v. uniflora, homogama, in glomerulum 
obovatum vel globosum dense aggregata.  Zmvolucrum generale pau: 
ciseriale, duplex ; squamis exterioribus foliaceis seu herbaceis per- 
sistentibus, interioribus scariosis cum paleis consimilibus capitula 
fulerantibus plus minusve deciduis. Axis seu receptaculum generale 
conicum, convexum, vel planum, stipitibus capitulorum minimis 
onustum. Jnvolucrum partiale 3—5-phyllum ; squamis scariosis pla- 
niusculis (costa tenui), cum floribus deciduis. Flores hermaphro- 
diti. Corolla tubulosa, sursum ampliata, 5-dentata, raro 4-dentata, 
tubo basi post anthesin in tuberculum skirrosum sepius dilatato. 
Anthere basi breviter caudate vel ecaudatæ. Stylus basi nunc 
bulbosus; rami apice capitellati, papillosi seu penicillati, Achenium 
obconicum vel obovatum, basi attenuatum, glabrum, apice basi skir- 
roso corolle tectum, calvum, vel in S. Preissiano coronula obsoletis- 
sima superatum.—-Herbz habitus diversi. 
The Skirrophorus Preissianus of Steetz is, as this author remarks, 
very different in aspect from the original S. Cunninghami, DC., yet 
much too closely resembling it in the whole structure, to admit of a 
generic separation. Besides a third species closely allied to 8. Preis- 
sianus (S. eriocephalus, Hook. fil. ined.), I have before me two or 
three others, differing still more widely in habit from the original species, 
and manifestly connecting Pogonolepis, Steetz, with Skirrophorus, un- — 
less, indeed, we establish nearly as many genera as there are known _ 
species. The common receptacle is paleaceous, the paleæ resembling 
the proper involucral scales, which they subtend, and deciduous with 
them, except perhaps in S. demissus. The species M e pd as 
follows :— 
$ 1. SKIRROPHORUS, DC., Steetz. 
biflorum, 4—5-phyllum; squamis hyalinis concavis obovatis v. spa- 
thulatis obtusissimis corollisque undique glabris. 
* Involuerum generale exterius glomerulo sphæroideo brevius, 
quasi truncatum, squamis zequalibus lana intricata inter se 
Involucrum partiale pre dip. a 
