This is the most common species of Arnica in the mountains, and is a handsome plant, standing from one to two feet high. It has pale green hairy leaves, which are markedly heart-shaped at the base, and many attractive blossoms composed of light golden rays, their deep yellow centres consisting of numerous disk-flowers. These blossoms, which are enclosed in a hairy involucre, formed by a series of narrow green bracts, grow singly or in pairs at the ends of the long slender stalks. The pappus is white.

Arnica latijolia, or Broad-leaved Arnica, has rather slender stems and radical cordate petioled leaves, the upper ones being • in two or three pairs, oval, usually sharply toothed, and closely sessile by a broad or contracted base. The flower heads grow on long slender hairy stalks in the axils of the upper leaves, the yellow rays have two notches at the apex, and the bracts of the involucre are oblong with a wide base and pointed apex.. The pappus is white.

Arnica alpina, or Alpine Arnica, is a graceful delicately formed plant, with long, narrow, toothed leaves, and a single flower with ten to fifteen rays, twice notched at the apex, terminating each stem. It also frequently has two additional flowers springing from the axils of the upper leaves. Several pairs of sessile leaves grow on the stems, and altogether the plant presents a more slender, refined appearance than do either of the two preceding species.

Arnica Chamissonis, or Chamisso's Arnica, is an extremely hairy species usually found near water. The leaves are very long, narrow and slightly toothed, the lower ones tapering into a marginal stalk and the upper ones being broad at the base and somewhat clasping. The flowers are both tubular and radiate flowers; receptacle flat; rays slightly toothed at the apex.

This is the most common species of Arnica in the mountains, and is a handsome plant, standing from one to two feet high. It has pale green hairy leaves, which are markedly heart-shaped at the base, and many attractive blossoms composed of light golden rays, their deep yellow centres consisting of numerous disk-flowers. These blossoms, which are enclosed in a hairy involucre, formed by a series of narrow green bracts, grow singly or in pairs at the ends of the long slender stalks. The pappus is white.

Arnica latifolia, or Broad-leaved Arnica, has rather slender stems and radical cordate petioled leaves, the upper ones being in two or three pairs, oval, usually sharply toothed, and .closely sessile by a broad or contracted base. The flower heads grow on long slender hairy stalks in the axils of the upper leaves, the yellow rays have two notches at the apex, and the bracts of the involucre are oblong with a wide base and pointed apex., The pappus is white.

Arnica alpina, or Alpine Arnica, is a graceful delicately formed plant, with long, narrow, toothed leaves, and a single flower with ten to fifteen rays, twice notched at the apex, terminating each stem. It also frequently has two additional flowers springing from the axils of the upper leaves. Several pairs of sessile leaves grow on the stems, and altogether the plant presents a more slender, refined appearance than do either of the two preceding species.

Plate LXIV

Alpine Arnica (Arnica alpina)

Alpine Arnica (Arnica alpina)

Arnica Chamissonis, or Chamisso's Arnica, is an extremely hairy species usually found near water. The leaves are very long, narrow and slightly toothed, the lower ones tapering into a marginal stalk and the upper ones being broad at the base and somewhat clasping. The flowers are smaller than those of the Heart-leaved Arnica, and the pale yellow rays have a single notch at the apex. The pappus is tawny.

Plate LXIV

Alpine Arnica (Arnica alpina)

Alpine Arnica (Arnica alpina)

Arnica Parryi, or Parry's Arnica, bears a curious flower with no rays at all, but only a receptacle of disk-flowers enclosed in a green involucre. These flower-heads usually grow in threes at the summit of the three short-branched stems. They appear to have simply lost their rays in the early stage of decomposition, but such is not the case; they never had any.

Arnica loniscana, or Schaeffer's Arnica, is a slender hairy plant with nodding flower heads of eight to ten noticeably pale lemon-yellow rays, and usually three pairs of leaves, the lower ones at the base of the stem being elliptical, entire or denticulate. The bracts of the campanulate brownish-purple involucre are lanceolate, acute and densely glandular-hairy at the base. The pappus is tawny.

Arnica julgens, or Notched Arnica, has oblong lanceolate pointed' leaves, the lower ones being toothed and stalked, and the upper ones sessile and entire. The flower heads grow on long slender hairy stalks, and the involucre is campanulate, its bracts being pointed and covered with long white hairs. The bright yellow rays are twice notched at the apex and the pappus is white.

Arnica gracilis, or Slender Arnica, is a smooth slender branched plant with slightly hairy leaves, the basal ones being broadly ovate, stalked, toothed and three-ribbed, as are also the two pair of stem-leaves, but the top pair are sessile. The flower heads have long narrow bright yellow rays with a single notch at the apex, and the twelve to fifteen invo-lucral bracts are lanceolate acuminate and hairy, as are also the seeds. The pappus is white.