ACADEMY OF SCIENCES. 



131 



Mr. Lockington described a species of lizard from Lower Cal- 

 ifornia. 



Dr. Kellogg read the following paper: 



On a recent visit to Mendocino County, Mr. Joseph H. Clarke, our corres- 

 ponding member and enterprising collector and contributor in several depart- 

 ments of natural history, gave some plants, and among them is found a new 

 species of Isopyrum, which it is proposed to name in his honor. 



Isopyrum Clarkii. K. 



Stem simple, filiform, glabrous — rarely more than one — 1-3 inches high, 

 1-flowered; root, a fasiculus of oblong sessile tuberlets; leaves biternate, radi- 

 cle leaf on a long slender petiole, the leaf or leaves about equaling the stem, 

 rarely exceeding it. Cauline relatively shorter, stipules minute, petiolules 

 very short, leaflets broadly obconic, 2-3 cleft lobed segments oblong, obtuse, 

 mucronate, base cuneate, about 2-3 lines long and 1 broad, somewhat glau- 

 cous beneath; flowers on long filiform terminal peduncles, white, 4-lines in 

 diameter; sepals oblong-obovate, subobtuse; stamens 9-10, filaments lance- 

 linear, flattened, somewhat petaloid — not dilated above — two-thirds the length 

 of sepals; folicular ovaries 5-6, oblong, flattened, about 3-seeded, on stipes 

 one-third their length. Differs from I. occidental* in its size and simple 

 1-flowered character, pods stipitate, 3-4 seeded, and more distinctly separate 

 stipules; the roots also are not the thickened fibres of that species, but true 

 ablong little tubers. Growing among mosses. 



The following plant of Mr. W. J. Fisher's collection at San Diego, is so 

 rare __if n ot altogether new— it is proposed to make it known provisionally as 

 a variety of Dr. Gray's. 



Actinolepis mutica. var. 



Stem erect, simple, oppositely branching above into a loose somewhat 

 corymbose spreading top, canescently villous, with short glandular hairs 

 throughout, more or less mixed with long simple hairs above; leaves opposite 

 (upper sessile), 1-2 inches long, pinnatifid, filiform, or narrowly linear lobes 

 from a somewhat broadened rachis, or margined petiole, rather palmately 

 mnltifid as reduced on the branches; peduncles slender, 2-3 times the length 

 of the leaves or 1-2 inches long, solitary and terminal, a few from the upper 

 axils, involucre broadly bell-shaped, scales about 12, or same number as the 

 rays, acute tips hispid and glandular somewhat recurved, loosely appressed 

 carinated to the middle; rays longer than the scales; akenes linear-cuneate, 

 black, minutely scabrulose, of the ray incurved; pappus very minute, about 

 5-8, obtuse, laciniated membranous or hyaline scales; receptacle sharply 

 conic finely pappillose-pubescent; disk florets yellow, glandular, tips of the 

 teeth bearded on the back and nerves each side of the sinuses often produced 

 into minute spines; branches of the style tipped by a short naked cone. 



