400 PROCEEDINGS OF THE AMERICAN ACADEMY. 



tereti laevissiino ; foliis lanceolati-ovatis tenuibus sessilibus acutissimis 

 basi rotundatis ; cymis laxe etiam atque etiam dicbotornis ; floribus in 

 dichotomis solitariis 1.5 cm. longis erectis ; pedicellis 8-30 mm. longis 

 rectis nudis ; calycis lobis 4 anguste lanceolatis acutissimis in media 

 parte herbaceis margine scariosis vix carinatis ex alatis ; corolla rubes- 

 centi vel purpurascenti fere ad mediam partem 4-secta; lobis ovatis 

 acutis ; filamentis gracilibus, basi exappendiculatis ; antheris mucro- 

 natis. — British Honduras: about plantations and in the openings 

 of the forests, near Manatee Lagoon, 27 January, 1906, Prof. Morton 

 E. Peck, no. 318 (type, in Gray Herb.). A species considerably resem- 

 bling 8. Usianthoides (Griseb.) Benth. '& Hook, f., but readily distin- 

 guished by its pedicelled flowers. 



Bvolvulus sericeus Sw., var. glaberrimus, n. var., ubique gla- 

 berrimus gracillimus, caulibus a basi pateati-ramosis suberectis 2.5-3 

 dm. altis ; calyce etiam glaberrimo, aliter formae typicae simillimus. — 

 British Honduras : low pine ridge near Manatee Lagoon, 28 March, 

 1906, Prof. Morton R Peck, no. 372 (type, in Gray Herb.). A form 

 remarkable for the complete absence of the silky pubescence, which is 

 to some extent present in all other specimens examined, even those of 

 the form glabratus Chod. &. Hassl., which has decidedly silky-villous 

 calyces. 



Schwenkia oxycarpa, n. sp., perennis erecta suffrutescens scoparia 

 5-6 dm. alta; radice fibrosa; caulibus teretibus cortice fusco-griseo 

 obtectis ; ramis gracillimis ascendentibus vel erectis viridibus teretibus ; 

 foliis linearibus acutis sessilibus crassiusculis subglabris 5-7 mm. 

 longis vix 1 mm. latis saepissime curvatis vel tortis 1-nerviis ; inflo- 

 rescentia ca. 1 dm. longa gracillima spiciformi ; floribus fasciculatis 

 sessilibus parvis ; calyce turbinato ca. 1.3 mm. longo obscure strigilloso, 

 dentibus lanceolatis acutis tubum subaequantibus ; corolla 4 mm. longa 

 atrocyanea rectiuscula, limbi dentibus 5 clavellatis quam sinuum lobi 

 obovati crassiusculi subbipartiti vix longioribus ; staminibus fertilibus 

 4 didynamis tubo corollae inclusis ; capsula lanceolato-ovoidea acuta 

 2 mm. longa firmiuscula minute papillosa. — British Honduras: open 

 damp ground, near Sibune River, 4 May, 1906, Prof. Morton E. Peck, 

 no. 417a (type, in Gray Herb.). This noteworthy species, through some 

 accident associated with no. 417 (an Angelonia), is clearly of § Brachy- 

 helus and most nearly approaches the east Brazilian S. fasckulata 

 Benth. It differs, however, in its essentially glabrous stem and rha- 

 chises, its never fascicled leaves neither perceptibly cuneate at the base 

 nor revolute on the margin, and finally in its lance-ovoid capsule. 



Angelonia ciliaris, n. sp., caulibus gracilibus inaequaliter 4-angu- 

 latis in angulis conspicue ciliatis ; foliis sessilibus oblongo-lanceolatis 



