81 
Summit of Mt. Warren in the Sierras, Congdon, This is intermediate 
between the other montanus forms and tegetarius but still has the 
hairs not fixed by the base. 
Es Astragalus montanus var. tegetarius (Watson Bot. King 76 (1871) 
as species). A. Kentrophyta var tegetarius Jones. A. aculeatus. Nelson 
. A. tegetarius car. implexus Canby. This is the high alpine form 
- With filiform matted prostrate stems, very short leaves and leaflets 
rather green, mostly flat and linear-oblong and abruptly aculeate. 
Stipules connate, hyaline, often needle-tipped, flowers minute to 7 mm. 
long, normally purple but often white, either a few on a manifest 
short peduncle or single and mostly sessile. Pods from 3 to 8 mm. 
long, from oval, or half-oval, to ovate, little oblique, apiculate, much 
or little flattened laterally, smoothish when mature. Pubescence 
attached by the base. The only constant character is the pubescence 
attachment, in all other respects it shades into A. montanus, while 
the broader leaved forms of it have the hairs attached close to the 
end. Common in the high mountains from Colorado to the Sierras 
end northward to Montana and the mountains of eastern Oregon. 
alpine and subalpine. 
17. Astragalus humistratus Gray Pl. Wright 2 43 (1853). Tium 
Rydberg. A. albulus Wooton & Stanley. Leaves except the lowest, 
almost sessile, short with rather many pairs of leaflets, mostly close- 
set. Stipules united almost to very tip and large. The species is 
very variable. The type character is given below. Stems intric- 
ately branched only close to the stout tap root, then straggling over the 
ground vine-like for 1-2 feet. Leaflets contignous less pubescent above, 
linear-oblong, fully 1 cm. long, acute, hoary. Bracts large, about as 
long as calyx, subulate-lanceolate. Peduncles longer than the leaves 
and with short-racemose pods which are narrowly oblong, somewhat 
faleate, 1.5-2 em. long, almost smooth to pubescent, several seeded 
rigid, sulcate dorsally and with raised ventral suture. Flowers 
rather many, thick, inclined to be subcapitate, lead-purple to dirty- 
white. Banner water-lined, obcordate, with sides reflexed below, 
the groove deeply fan-shaped below and shallowing above making the 
banner seem hooded from behind. Wings nearly acute, sinuate to 
notched on the lower side, arched to about 20 degrees, oblanceolate 
to obovate, 3 mm. wide, wider than the keel, the right hand one hooked 
over the end of keel and 1 mm. longer than keel, about 4 mm, long, 
light-colored. Keel dark-tipped, the erect part about as long as base 
and produced and rather acute, 3 mm. long. Calyx obcompressed 
toward tip, campanulate, about 3 mm. long, with rounded sinuses. 
often 2-bracted at base, from hoary when young to smooth when old, 
often wrinkled; teeth subulate and about as long as tube. Leaves. 
less pubescent above, often silvery. From the borders of Texas to 
the Sierra Madres of Chihuahua and the Colorado river and north- 
ward to Las Vegas, New Mexico, to the Navajo Basin, Panguitch and 
Cedar City Utah and Pioche Nevada on gravelly mesas among pines 
and junipers, Lower and Middle Temperate life zones. The species 
seems to vary only in the San Francisco Mt. region, where it is 
common. A. Arizonicus has much the same appearance as this. 
| Astragalus humistratus var. Sonore (Gray) Jones Cont. 10 58 
(1902). ja Hnos Gray Pl. Wr. 2 44 (1853). Petioles evident. 
Leaflets linear, rather distant, over 1 cm. long, acute, hoary. Pedun- 
cles not longer than leaves. Pods lunate hardly 1 cm. long, 
much incurved, about 5 mm. high from suture to suture, not sul- 
cate, much obcompressed below. Plants less elongated. Stems long- 
persistent. This is a common form in Arizona to id City Dr cis E 
Astragalus humistratus var. Hosackiae (Greene) Jones Cont. 10 
58 (1902) A. Hosackiae Green Bull Cal. Acad. 3 157 (1885), Whole —— 
plant sparingly pubescent, Leaflets smooth above, elliptical, hardly 1 
