318 PROCEEDINGS OF THE AMERICAN ACADEMY, 
flowering branches; flowers glabrous: fruit oblong, 4 cm. long, 8 mm. 
broad, about 8-seeded, abruptly acuminate at each end, thin, lucid, hispid 
on margin and valyes with short spreading sete.— Benth. in Hook. 
Jour. Bot. iv. 410, & Trans. Linn. Soc. xxx. 417.— Acatlan, 
Andrieux (acc. to Benth.) ; Tomellin Cafion, Oaxaca, altitude 775 m. 
Pringle, ng, 4635 (distrib. as MW. disticha); Acaponeta, Tepic, Rose, no. 
1475; also in W. Mexico, Palmer, 1891-1892, without number. The 
fruit of this speeies was unknown to Benth. The still sparing material 
available has the fruit most often hispid and that form of pod is accord- 
ingly assumed to be typical. A doubtful form with glabrous somewhat 
more numerous and relatively narrower leaflets has been collected with 
out fruit in Oaxaca by L. C. Smith, no. 202, and Nelson, no. 2629. 
Var. levior. Fruit nearly or quite free from hispidity: otherwise 
indistinguishable from the plant here regarded as typical. — Collected 
in W. Mexico, 1891-1892, by Dr. Edward Palmer, but without number 
or more precise data. Types in herb. Gray and herb. U. S. Nat. Mus. 
++ ++ Pods tomentose, armed or unarmed ; segments subequilateral or longer than 
broad. 
= Stems not glandular. 
a. Calyx subtruncate, very short, 0.8 mm. long, a quarter the length of the 
corolla: spikes long. 
27. M. Palmeri, Ross. Large shrub, unarmed or with occasional 
infra-stipular spines: pinne 9 to 15 pairs; leaflets 7 to 10 pairs, elliptic- 
oblong, not crowded, glabrous above, puberulent beneath: spikes 
(including peduncles) 7 to 10 cm. long, numerous in showy terminal 
leafless panicles; flowers purplish, puberulent: young fruit linear-atten- 
uate, tomentulose. — Contrib. U. S. Nat. Herb. i. 99. — Near, Alamos, 
Paimer, no. 628; collected in flower in September. 1840) 
om 28. M. fasciculata, Benru. Shrub with stout angulate branches 
_ and tawny or rusty-tomentose branchlets: spines short, broad- based, 
k red, mostly infra-dxillary, commonly grouped by 2’s or 3’s: leaves 
when well-developed 2 to 3 dm. in length; pinne 11 to 20 pairs; leaflets 
8 to 15 pairs, oblong, villous-tomentose upon both sides: spikes crow 
in a terminal raceme; flowers silky-villous: pods narrow, attenuate, 
forragimeous-tomentose and hispid with numerous reddish brown rigid 
oa — Benth. in Hook. Lond. Jour. Bot. vy. 88, & Trans. Linn. 
Soe, xxx. 414; Wats. Proc. Am. Acad. xxii. 409. ML cinerea, Herb. 
Pavon acc. to Benth. 1. c. Acacia fasciculata, Kunth, Mim. 75, 
sae Originally collected near Guanajuato by Humboldt & Bon- 
: 7 teen ee Karwinski without exact locality; on hillsides nea? 
