THE GRASSES OF BRITISH HONDURAS AND THE PETEN, GUATEMALA 177

 BRITISH HoNDURAS. Corozal District: Corozal, Lundell 4833; Gentle 87.
Orange Walk District: Honey Camp, Lundell 566. Belize District: Pros-
pecto, Gentle 938. El Cayo District: El Cayo, Bartlett 11498.

4. Ichnanthus pallens (Swartz) Munro; Benth. Fl. Hongk. 414. 1861.
 Perennial or appearing annual; culms slender, freely branching, widely
spreading, rooting at the nodes; blades lanceolate, 5 to 10 cm. long, 1 to
2 cm. wide, somewhat unsymmetrical, rounded at the base, glabrous or
nearly so; panicles numerous, terminal and axillary, 5 to 10 cm. long, the
branches narrowly ascending; spikelets 3 to 3.5 mm. long, appressed, gla-
brous, the glumes and sterile lemma acuminate; appendages of the fertile
lemma reduced to scars. Forests, thickets, and shady banks, southern
Mexico and the West Indies to Argentina.
 BRITISH HONDURAS. Belize District: Manatee Lagoon, Peck 172, 312.
Sibun River, Smart 73. Gracie Rock, Gentle 1584. Stann Creek District:
All Pines, Schipp 784. Toledo District: Rio Grande, Smart 50. Temash
River, Smart 56; Schipp 1375.
 GUATEMALA. Peten: Uaxactun, Bartlett 12330. Monte Santa Teresa,
Lundell 2754.

5. Ichnanthus tennis (Presl) Hitchc. & Chase, Contr. U. S. Nat. Herb. 18: 334. 1917.
 Annual; culms freely branching, very slender, weak, widely spreading,
rooting at the nodes, the ascending fertile shoots 10 to 20 cm. long; blades
1 to 5 cm. long, 4 to 10 mm. wide, lanceolate, thin, more or less undulate,
pubescent; panicles terminal and axillary the peduncles very slender, usually
long-exserted, the branches rather stiff, widely to narrowly ascending;
spikelets 3 mm. long, acuminate, sparsely pilose, at least on the margins;
first glume attenuate-pointed. Moist shady places, British Honduras and
Trinidad to Colombia.
 BRITISH HONDIUAS. El Cayo District: Mountain Pine Ridge, Bartlett
11625, 11626. Belize District: Gracie Rock, Gentle 1599. Stann Creek
District: Sittee River, Schipp 775.

 35. LASIACIS (Griseb.) Hitchc.
Culms simple or sparirg!l branched, erect; blades cordate. ................. L. procerrima
Culms much branched, prostrate or clambering; blades not cordate.
 Ligule prominent, 2 to 3 mm. long ...............__._. ...._ 2. L. oaxacensis
 Ligule inconspicuous, less than 1 mm. long.
 Culms prostrate, rooting at the lower nodes ...-_... ...........-...-...- 3. L. grisebachii
 Culms clambering, the base erect, not rooting at the lower nodes.
 Blades glabrous on both surfaces.
 Blades mostly less than 1 cm. wide; panicles 5 to 8 cm. long..-4. L. divaricata
 Blades 25 to 4 cm. wide; panicles 15 to 25 cm. Iong .._ ... 5. L. sloanei
 Blades pubescent on both surfaces or the upper nearly glabrous.
 Culms densely papillose-pilose__... ......... ..... ...... 6. L. papillosa
 Culms glabrous or nearly so.
 Blades asymmetrical, ovate-lanceolate; panicles compactly flow-
 ered, the branches appressed........... .................... 7. L. ruscifolia
 Blades symmetrical, lanceolate; panicles loosely flowered, the
 branches stiffly spreading_ .......... -___ -_... ...........__8. L. sorghoidea