Polypodium apiculatum Kunze. Songo, Nov. 1890 (901b).
Notholaena sinuata Kaulf. Talca Chugiaguilla, Apr. 1890 (786).
Notholaena ferruginea Hook. Yungas (205). Talca Chugiaguilla,
(787). La Granga (752)= Rusby's 332, 333, 335 and 336.
Monogramme graminoides Baker, Syn. Fil. 375. Songo, Nov.
1890 (907b).
Gymnogramme calomelanos Kaulf. Yungas, 1890 (244).
Gymnogramme angustifrons Baker. Yungas, 1890 (693).
Gymnogramme tartarea Desv. Yungas, 1890 (305).

Gymnogramme retrofracta Hook. & Grev. Yungas, 1890 (661)=

Rusby's 128.

Meniscium serratum Cav. Yungas, 1890 (554)=Rusby's 412.
Vittaria stipitata Kunze. Yungas, 1890 (353) Rusby's 349.
Acrostichum cuspidatum Willd. Yungas, 1890 (434a).
Acrostichum latifolium Sw. Yungas, 1890 (434).

ACROSTICUM MOOREI E. G. Britton sp. n.

Rhizomes slender, purple, sparsely beset with brown scales and fibrillose radicles; sterile fronds 3-5 inches long, pinnately divided almost to the midvein into 18-20 slender bifurcating segments; stipes 2-3 inches long, grooved and sparingly beset with lower scales; fertile fronds on longer stipes, 3-4 inches long, blade short, less than 1 inch long by 4 inch broad, crenately lobed with 6 or 8 shallow sinuses on each side.

Yungas, 1890 (558).

Belonging to the section Polybotrya H.B.K., differing from its nearest ally, A. bifurcatum, in having the fertile frond almost entire, not pinnately parted, and the rhizome more slender and creeping, less tufted in habit.

Collected also by W. Lechler, near Sachapata, on trunks of trees, and distributed as No. 2609, Plantae Peruvianae. Seen at Kew in Thomas Moore's fern herbarium, labelled " Indeterm. Mett. n. sp.?" Anemia tomentosa Sw. Yungas, 1890 (304) Rusby's 118. Anemia tomentosa var. fulva H.B.K. Yungas, 1890 (438). Anemia tomentosa var. (?). Yungas 1890 (439).

Lygodium venustum Sw. Yungas, 1890 (560) =Rusby's 144.

MUSCI.

(Communicated by Mr. Charles Wright.)

Sphagnum acutifolium Ehrh. Yungas, 1890 (481 and 569).

Pogonatum tortile Swz. Songo, Nov. 1891 (908).
Polytrichum juniperinum Hedw. Yungas, 890 (280).
Bryum Beyrichianum C. Müll (?). Yungas, 1890 (566).
Phyllogonium viscosum Mitt. Yungas, 1890 (565).
Thuidium delicatulum Lindberg. Yungas, 1890 (482).

HEPATICAE.

(Communicated by Mr. Charles Wright.)

Frullania atrata Nees. Yungas, 1890 (567).

Radula Xalapensis Nees et Mart. (?)
Isotachis Sp. Yungas, 1890 (713, a).
Micropterygium vulgare Nees. Songo, Nov. 1890 (908a).
Marchantia polymorpha L. Songo, Nov. 1890 (910).
Reboulia hemispherica Raddi. Yungas, 1890 (605).

Yungas, 1890 (511a).

LICHENES.

(Communicated by Dr. J. W. Eckfeldt.)

Baeomyces imbricatus Hook. Yungas, 1890 (713).

Cladonia rangiferina (L.) Hoff. Vic. La Laz, 10,000 ft. 1889 (20, a). Cladonia ceratophylla Eschw. (Sterile.) Yungas, 1890 (568). Cladonia peltata Spreng. (Sterile.) Yungas, 1890 (570). (Kindly determined by Dr. H. Mueller.)

Peltigera canina Hoffm. Yungas, 1890 (296.)

Theloschistes chrysophthalmus (L.) Norm. Vic. La Paz, 10,000 ft.

1889 (135, a).

Usnea barbata (L.) Fr. Vic. La Paz, 10,000 ft. 1889 (135. Stereocaulon virgatum Nyl. Vic. La Paz. 10,000 ft. 1890 (225).

FUNGI.

(Communicated by Mr. Charles Wright.)

Stereum caperatum Berk. Yungas, 1890 (295).

ALGAE.

(Communicated by Mr. Charles Wright.)

Rhizoclonium sp. (other Algae are also intermixed). Vic. La Paz,

10,000 ft. 1890 (164).

(Enteromorpha intestinalis Link.

Rhizoclonium sp. Vic. La Paz, 10,000 ft. 1890 (166).

(PLATES 83-85.)

* Submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy, in the University Faculty of Pure Science, Columbia College.

History.

The study of this plant was undertaken for the purpose of discovering, if possible, some additional facts concerning its habit of ripening fruit under ground. Other species of the Leguminosae are known to share this peculiarity with Arachis. Among the best known of these are Vicia amphicarpa and Trifolium subterraneum. Vicia amphicarpa bears two kinds of flowers and accordingly two forms of fruit, only one of which is developed under ground. The flower which gives rise to this fruit is formed and always remains underground. The other form of flower and fruit. is developed normally, so that in this case the peculiarity of the plant lies as much in its underground flower as in its underground. fruit, as the latter seems to be a natural sequence of the former.

Trifolium subterraneum bears but one kind of flowers. These are developed in heads. After flowering, the peduncle bearing the head sinks to the ground and, continuing to lengthen, pushes the head under the soil. The seeds will ripen above ground, and, according to Belli, if the heads are prevented from going into the earth, the seeds germinate easily if the integument is broken; otherwise the germination takes place with difficulty.