1919] Fernald,— Arenaria sajanensis 15 
According to*Index Kewensis, Arenaria alpina Porter & Coulter, 
Syn. Fl. Colo. 14 (1874) is A. obtusa Torr., but it is in every way 
inadvisable to take up the name. Porter & Coulter obviously sup- 
posed they were listing a Linnean species, although Linnaeus had no 
A. alpina. They cite Alsine biflora Wahl, as a synonym, i. e. Aren- 
aria sajanensis Willd; their description of the leaves as “narrowly 
linear, 3’’-33”’ long” belongs clearly to A. saianensis, not A. obtusa 
Torr. and their citation, Hall & Harbour 77 is inconclusive, since 
no. 77, at least in the Gray Herbarium, is a mixed number, consisting 
mostly of A. sajanensis. 
The name Alsinopsis obtusiloba Rydberg is not much clearer in 
its application, although it may be fairly inferred that Rydberg was 
changing the name of Arenaria obtusa Torr. on account of Allioni’s 
earlier species of that name. But the other citations given by Ryd-_ 
berg are not helpful: Ar. biflora Wats. was based definitely on Alsine 
biflora Wahl. and is, therefore, Ar. sajanensis Willd; while “ Arenaria 
sajanensis Robinson, Proc. Am. Acad. 29: 304. 1894. Not A. 
sajanensis Willd. 1816” was largely A. sajanensis Willd, but with all 
the species here discussed, A. obtusiloba, A. marcescens and A. larici- 
folia? confused with it. Only through inferring, then, that Rydberg’s 
Alsinopsis obtusiloba was intended as a renaming of Ar. obtusa Torr. 
does Rydberg’s name become definite. 
A. marcescens, n. sp., dense caespitans, caudiculis enna lignes- 
d ntibus 
eentibus ramosissimis 0.5-2.5 dm. lo ongis, foliorum remn 
Miereacen tibus rigidis ie palermo foliis coriaceis vitidi ibus 
glaberrimis ek acts obtusis 4-8 mm. longis 0.3-0.5 mm. latis, 
ange crasso; cauliculis casas 2-5 em. altis 1-floris glandu- 
®so-pilosis remote bracteatis, bracteis 2-4-jugis lanceolato-subulatis; 
pedunculo 0.6-1.5 em. ae calycibus purpurascentibus vel fuscis 
sii ang stramineis lineari-oblongis apice emarginatis; semi- 
tay le 'vacels vel brunneis reniformi-obovatis, laevissimis 0.8-1.2 
a apice radiculari rostellata 
cespitose, with the trailing and freely forking lignescent 
branche 0.5-2.5 dm. long and closely covered with the rigid marces- 
aah swbnants of the leaves: — coriaceous, bright green, strictly 
with om mca arse obtuse, 4-8 mm. long, 0.3-0.5 mm. wide 
a thick midrib: baci stems ascending, 2-5 cm. high, 
