646 LYCOPODIACEAE. [ Psilotum, 
— Spring, ]. c. I, 84. — Brack. l. c. p. 329. — L. heterophyllum, Hook. 
& Grey. Ic. Fil. tab. 113. — L. fastigiatuwm, Spring, |. c. II, 41, as to the 
Hawaiian plant. 
8 var. herpeticum. — Stem far trailing. Branches distant, shorter and 
sparingly divided, but each with 3—5 peduncles which are long-exserted 
(4—5’) and bear 4—7 spikes each. Cauline and branch-leaves also ending 
in short hairs, those of the peduncular leaves very long. 
Rare. Eastern slope of Kaala, Oahu! the palis of Waikolu and Pelekunu, Molokai! 
si ; F 
Mauna Loa, ii! Kauai! variety on Haleakala and the top of Eeka, Maui! 
‘iffers from the widely spread L. clavatum, L., the ri d ulate S, 
The whitish filiform point, so characteristic in all the leaves of the latter species, ee 
e in the agree peduncular an oO t rameal : pigs ro) 1 leaves 
throw it off; variety it remai e stem g orm § trails 
as far as t 4g Vetopta plant, which it also resembles in the pina fastigiate branches, 
10. L. volubile, Forst. — Spring, l. c. I, 105, IT, 49. — Stem 
slender, long-trailing, even twining, its branches 8—10‘ long, distichous 
(branches and branchlets lying in one plane), subexcurrent. Leaves pale, 
those of the stem and fertile branches or peduncles of one kind, small, 
subulate, appressed, distant; the branch-leaves in 5 ranks of two kinds; 
the lateral ones distichous, larger, 11/2‘, oblong - is uneven-sided, 
patent, decurrent from a sessile base, acute, rere the in intermediate ones 
small, appressed, two anterior subulate, one pos r, minu ae mucroni- 
form. Spikes numerous on repe datadity toad ng preorder often re: 
curved branches, slender, terete, '/2—2‘ long. Bracts ovate, mucronate, 
serrulate, 3/2“ fer — Hook. & Grey. Ic. Fil. tab. 170. — Hook. Fl. 
N. Zeal. I, 391. — Carruth. in Fl. Vit. p. 329. — Benth. Fl. Austral, 
VI, 67 
Hawaii. Collected only by Menzies, probably on Mauna Loa. The species inhabits 
also the Society and Viti Islands, New Zealand, Australia and Java 
2. PSILOTUM, Sw. 
Spore- cases of one kind only — microsporangia —, sessile on minute bifid 
leaflets, 3-lobed, 3-celled, opening loculicidally with 3 valves, containing 
a yellowish powder of minute spores which are marked with a single 
— Stems angular, dicho he with few minute distant scale-like 
leaves, the ann ones simple, subulate. No roots proper 
small tropical and subtropical genus, common to the New and the Old ee 
triangular below and in the fertile branches Li Pe ee 
aanches all flattened ‘ ; Soe. haem ae 
1. P. triquetrum, Sw. poe Fil. p. 187. — Rhizome short, thick and 
intricately ee Stems 3—12‘ high, repeatedly forking, triangular 
below and in fertile branches, the barren ones often Radian, Leaves 
minute, subulate, the fertile ones bifid. Capsules globular, about 1” in 
diameter. — Hook. Gen. Fil. tab. 84. — Bot. Beech. p. 102. — P. dicho: 
