158 UNITED STATES AND MEXICAN BOUNDARY, 
March—October. Near Monterey, Mexico; Dr. Edwards and Major Eaton. (No. 480 and 
1546, Wright.) Plant about a foot high; often several stems from one root; branches terete, 
slender, erect. Leaves 6-10 lines long, half a line to a line in breadth, often crowded. Spikes 
at first short, but in fruit 2 or 3 inches long, slightly circinate when young. Calyx a little 
shorter than the tube of the corolla; the lobes lanceolate, equal, erect. Corolla apparently 
white, about 2 lines long; lobes lanceolate, acute, spreading, or somewhat erect. Stamens 
inserted in the middle of the tube of the corolla; anthers oblong, smooth at the tip. Stigma 
elongated and narrow, from a somewhat dilated base; style as long as the ovary. Nutlets often 
alternately smaller, with a narrow face, which is marked with 2 distinct pits. 
HELIOTROPIUM LIMBATUM, Benth. Pl. Hartw. p. 20, No. 154; DC. Prodr. 9, p. 543. Murin, 
Mexico; Thurber. San Carlos, Mexico ; Berlandier, No. 3199, Monterey, Mexico ; Dr. Edwards 
and Major Eaton. A small prostrate much branched species. Stem suffruticose. Leaves about 
3 lines long, cinerous, hispid, patulous. Spikes very short, few-flowered, mixed with leaves at 
the extremity of the branches. Limb of the corolla much dilated and undulate, angularly 
5-lobed. Anthers a little coherent and bearded at the tip. Style 3 times as long as the ovary. 
Stigma conical from a dilated subglobose base; bifid at the apex. This species seems to be 
nearly allied to H. humifusum, H. B. K. 
HELIOTROPIUM LIMBATUM, var. CONFERTIFOLIUM : caulibus robustioribus, ramulis suberectis ; foliis 
lanceolato-linearibus confertissimis subappressis. Plains near Leon Springs, September ; Bige- 
low. San Vincente; Parry. Cerralvo, Gregg. (No. 481 and 1547, Wright.) This is a much 
stouter and larger plant than Bentham’s, and differs strikingly in its narrower, somewhat 
appressed and crowded leaves. Flowers pale purple (Gregg). 
HELIOTROPIUM TENELLUM, Torr. in Marcy Report, t. 14. Lithospermum tenellum, Nutt. Fl. 
Arkans. in Trans. Amer. Phil. Soc. n. ser. 5, p. 189. L. angustifolium, Torr. in Ann. Lyc. N. 
York, 2, p. 225, non Mich». (where the nutlets are incorrectly described as smooth and polished.) 
High plains near Howard's Springs, and Rio San Pedro, western Texas, October ; Schott. (No. 
1559, Wright.) Western Texas; Marcy. Prairies near San Augustin, Texas; Leavenworth. 
On the Red river, Louisiana; Dr. Hale. Tennessee; Mr. Curry. Plant about a foot high, often 
much branched. Leaves an inch long and 1-14 line wide. Racemes few-flowered, naked or 
somewhat leafy ; the flowers distant, conpicuously pedicellate. Calyx very unequalky 5-parted ; 
the segments lanceolate-linear, in fruit much longer than the nutlets. Corolla white, 23 lines 
long; the lobes obovate-oblong and rather obtuse. Anthers oblong, slightly bearded at the tip. 
Stigma nearly sessile, oblong, tapering upwards, bifid at the summit. Nutlets subglobose, the 
upper part appressed-pubescent, below the middle (and often also above) reticulated, not verru- 
cose as represented in the figure quoted above, without foveoles on the face. 
TIELIOPHYTUM PARVIFLORUM, DC. Prodr. 9, р. 553. Heliotropium parviflorum, Zinn. Plains 
near Eagle Pass, September, (fruit); Bigelow. Lower Rio Grande, in various places, April— 
Мау; Schott. Monterey, Mexico; Dr Edwards, Gregg. We have specimens also from Key 
West, Florida, collected by Blodgett. 
HELIOPHYTUM (Салома) MOLLE (n. sp.) : suffruticosum, griseo-velutinum ; foliis deltoideo-ovatis 
basi in petiolum abrupte angustatis margine undulatis; pedunculis terminalibus bifidis spicis 
conjugatis nudis scorpoideis ; floribus sessilibus ; calycis lobis lanceolatis corollee tubo paullo 
brevioribus ; corollz lobis obtusis crenulato-undulatis : fructu subgloboso velutino apice integro; 
