CATALOGUE OF PLANTS. 189 L. clavatum, L. C Woods and thickets; very common. C. 806 L. complanatum, L. TRAILING CHRISTMAS GREEN. Dry woods and thickets; common. Var. Chamaecyparissus (Braun), D. C. Eaton. Woods and mountain thickets; infrequent. Between Jordan Pond and Eagle Lake (Redfield); — between Jordan Pond and Northeast Harbor (R. & R.); — Pemetic Mt.; woods, Aunt Bettys Pond (Rand). 807 SELIGINELLACEÆ. SELAGINELLA, Beauv. S. rupestris (L.), Spring. Rare and local. Flying Mt. (H. C. Jones, Rand); — Dog Mt. (Elizabeth G. Britton, Rand, E. Faxon). 808 ISOETES, L. QUILLWORT. I. lacustris, L. Infrequent. Mouth of Deer Brook, Jordan Pond (Redfield); — west shore of Jordan Pond (Rand). A very small form on west shore of Jordan Pond (Rand). A peculiar form, probably of this species, Deer Brook (Rand); — Northwest Arm, Great Pond (Fernald). 809 I. echinospóra, Durieu, var. Braunii (Durieu), Engelm. Sandy and gravelly brook courses and pond shores; frequent. Jordan Stream; Deer Brook; shores of Jordan Pond (R. & R.); — Somes Stream; Denning Brook (Rand). 810 I. riparia, Engelm. Rare. Somes Stream (George G. Kennedy); — southeast end of Ripples Pond (Rand). A form “not typical I. riparia, and yet quite a departure from I. lacustris,” — Ripples Brook (Rand, M. L. Fernald), fide L. M. Underwood. 811