148 rouo-scierocarpl. 
fresh grass-green to brownish and becoming reddish, very fleshy 
with. walls about 2 mm. thick, not at all woody and with thin 
inner skin-like wall, the whole becomes when dry spongily carti- 
laginous, the dorsal suture is a trifle thickened when fresh, pod 
then smooth and not at all wrinkled or nerved, thick-winged and 
wing obtuse, when dry wing is sharp and thin. Flowers pink-purple, 
about 1 cm. long, 7-9, congested. Banner ovalovate, retuse, abruptly 
arched to 45 degrees at end of calyx tube, sides reflexed fully 3 mm. 
wide from middle up but not turned far back, groove V-shaped, 
fully 2 mm. deep below, about 1 mm. wide and widening to 3 mm. 
above, white spot oblong-fan-shaped and purple lined and lacerate 
above, filling the groove, the rest of banner purple. Wings nar- 
'rowly oblong, straight, rounded at tip, flaring about equally 2 mm. 
below tip and then turned nearly horizontal as in A. amphioxys, 1 mm. 
longer than keel, about 2 mm. wide and much narrower than keel, 
purple, very blunt. Keel short, straight, at tip sharply arched to 90 
degrees, very obtuse, purple, 3 mm. high. 5 mm. long. Bracts trian- 
gular, green, rigid, conspicuous, shorter than the pedicels. Pedicels 
stout in fruit, 3-5 mm. long. Peduncles about 1 dm. long, sulcate, 
rather stout and strict. Fruiting rachis about 5 cm. long. Leaves not 
over 8 em. long, almost sessile. Petioles about 1 em. long, the rachis 
filiform and persistent and rigid. Leaflets not jointed to rachis, 2-4 
pairs, linear, channeled sharply acute, 2.5-4 cm. long, hardly 1 mm. 
wide, sometimes arched a little, distant, strongly 1-nerved, puberulent 
on both sides, about as wide as rachis, the terminal one represented 
by it and and not enlarged. Stipules green, closely reflexed, trian- 
gular, spreading to reflexed. Stems weak and outer ones ascending 
only, suleate, proper stems rarely over 2 dm. long, ashy. This grows: 
along the flats of the Humboldt Nevada, along with salt grass, Spo- 
robolus and the like. Lower Temperate life zone. This has the habit 
and eeneral appearance of A. pectinatus, and grows in similar meadows 
103. Astragalus tetrapterus Gray Proc. Am. Acad. 13 369 (1878). 
Pods 4-angled, not conspicudusly obcompressed, when dry shining and > 
smooth, with fine cross veins sometimes branched in the middle. 4- 
winged by having both sutures raised as wings as well as the sides 
produced in.short wings, with cross section diamond shaped, often 
oblately so, pod narrowly oblong, inclined to be broader above, the 
base and tip.triangular acute, in the green pods they are only 4-angled, 
purple-spotted, with solid walls fleshy but not woody and 2 mm. thick, 
internal cavity then inclined to be linear showing that the pod is 
really obcompressed, pod about 4 cm. long, 1 cm. wide and 5 mm. 
high, falcate like à ramshorn, not splitting the calyx, the valves when 
ripe curlinz out at tip, not more than coriaceous when ripe. Flowers 
subcapitete, 5-9, white or purple, 1.5-2 em, long, narrow erect, banner 
oblong (linear as you look at it), 4 mm, wide, 1-1.5 cm. long, árched 
in gentle arc to 45 to 60 degrees, notched, with pink veins near the 
keel tip, 5-8 mm. longer than keel, sides most reflexed (to 90 degrees) 
opposite keel, narrowly fiddle shaped, reflexed part 1. mm. wide, 
groove narrowly V-shaped and ? mm. deep below keel and shallowing 
almost into a nerve at tip. Wings close pressed to keel to within 
2 mm. of its tip and then spreading to 2 mm. apart at the ends, 
concave to keel and parallel to it, 2 mm. wide, with involute edges, 
about half as wide as keel, linear, obtuse, nearly straigbt, white 
or purple, 2 mm. longer than keel. Keel a little downwardly arched 
and then bent in a half circle to the obtuse tip, pink or purple- tip- 
ped, 6 mm. longer than calyx tips. Calyx slightly angled, greenish- 
white, about 7 mm. long and 2 mm. high, laterally compressed, erect, 
narrowly oblong, nearly straight, gibbous, the nerves less evident 
. and farther apart than in pterocarpus. Teeth subulate, 2 mm. long 
.. Pedicels slender when dry, 4 mm. long, strict, inclined to be 2-bracted 
i ee EAN PA A UNDE HIR JO, Mia dcn e 
