402 PROCEEDINGS OF THE AMERICAN ACADEMY. 
— Mexico : shaded cliffs of mountains, near Monterey, Nuevo Leon, 
25 April, 1906, C. G. Pringle, no. 13,877 (type, in Gray Herb.). An 
flowers, and from the latter in its membranaceous strigillose but 
unciliated leaves, more filiform stems, etc. The absence of fruit and 
seeds naturally throws a slight doubt upon the generic position, but 
the general habit, as well as such technical traits as are manifest, are 
those of Houstonia. 
Neurocalyx calycinus (R. Br.), n. comb. Argostemma calycinum 
R. Br. in Bennett, Pl. Jav. Rar. 97 (1838). Newrocalyxr Wightii Arn. 
Ann. Nat. Hist. iii, 22 (1839). NN. Hookeriana Wight, Ic. i. t. 52 
(1840). 
Rondeletia leptodictya, n. sp., fruticosa 2 m. alta; ramis gra- 
cilibus rubro-brunneis flexuosis teretibus mox glabratis ; foliis oppositis 
obovato-oblongis acuminatis basi modice angustatis tenuibus supra 
viridibus tenuiter (sub lente) reticulatis glabris vel subglabris subtus 
juventate griseo-tomentosis 6-11 cm. longis 2.5-5 em. latis; petiolis 
gracilibus 5~12 mm. longis pubescentibus ; stipulis ovato-lanceolatis 
acutis brunneis 4 mm. longis erectis ; pedunculis terminalibus 4—-5.5 em. 
longis gracilibus arachnoideis; floribus sessilibus dense capitatis; 
calycis tubo albo-lanato subgloboso 1.8 mm. diametro, lobis limbi 
4 vix inaequalibus oblanceolatis viridibus vix 2 mm. longis; corolla 
sanguinea, tubo gracili sursum vix ampliato 1.4 cm. longo grise0- 
arachnoideo, lobis limbi 4 patentibus 2-3 mm. longis, ore nudo ; stylo 
exserto. — Mexico: banks of the Rio Petatlan near the boundary 
between Michoacan and Guerrero, alt. 500 m., 24 November, 1898, 
E. Langlassé, no. 666 (type, in Gray Herb.). Near 2. elongata Bartl., 
but with calyx-lobes much shorter (scarcely a fifth the length of the 
corolla-tube), the limb of the corolla smaller, and the stipules muct 
shorter than the petioles. : : 
Rondeletia rufescens, n. sp., fruticosa; ramis teretibus tarde 
glabratis cortice griseo tectis, ramulis et pedunculis et petiolis dense 
rufo-tomentosis ; foliis lanceolato-oblongis 9-15 cm. longis 32-5 cm. 
latis apice basique acuminatis tenuibus supra obscure reticulatis . 
molliter puberulis subtus albido-tomentosis, nerviis lateralibus ¢ 
10-jugis ; inflorescentiis terminalibus thyrsoideis flexuosis ca. 1.5 - 
longis rufo-tomentosis ; cymulis superioribus subsessilibus inferioribus 
_2-12 mm. longe pedicellatis bracteis lineari-subulatis ca. 3 mm. longis 
suffultis multifloris; floribus brevissime pedicellatis aut i 
calycis tubo subgloboso minute hirsuto, lobis 4 linearibus inaequali 
