154 FLORA OF MOUNT DESERT. 535 C. acaule, Ait. STEMLESS LADY'S SLIPPER. Common in woods. Forma albiforum. Flowers pure white, or white with indistinct pink veins. Near Breakneck Ponds (Rand); — Beech Mt. Notch; woods, Hadlock Lower Pond (R. & R.). IRIDACEÆ. IRIS FAMILY. IRIS, L. BLUE FLAG. 536 I. versicolor, L. [illegible] Very common everywhere in moist ground, especially in low grounds near the coast. SISYRINCHIUM, L. BLUE-EYED GRASS. 537 S. angustifolium, Mill. S. Bermudiana, L.* Common in grassy places. Whatever may be the fact in re- gard to the specific rank of S. anceps and S. mucronatum, all the Island forms must be referred to S. angustifolium. A specimen with a single spathe, collected by F. M. Day, in 1882, probably in the vicinity of Bar Harbor, has been somewhat doubtfully marked S. anceps in the herbarium. A recent and more careful examination, however, seems to show that it is nothing more than S. angustifolium with smaller, probably immature seeds. It is worthy of remark that not a specimen of the true S. anceps form has yet been found on the Island, although S. angustifolium is so very abundant. This fact is evidence that these forms of the plant merit at least varietal distinction. LILIACEÆ. LILY FAMILY. HEMEROCALLIS, L. DAY LILY. 538 H. FULVA, L. Often by roadsides near dwellings; escaped from cultivation. Town Hill (R. & R.); — Somesville; Emery District; South- west Harbor (Rand). Adventive from Europe. * See Morong, Bull. Torr. Bot. Club, xx. 467.