138 UNITED STATES AND MEXICAN BOUNDARY. 



Marcli — October. Near Monterey^ Mexico ; Dr, Edwards and Major Eaton. (No, 480 and 

 15465 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 shortj 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 

 w^hite, 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 



a somewhat dilated base : style as Ion 2: as the ovary. Nutlets often 



om 



alternately smaller, with a narrow face, Avhich is marked with 2 distinct pits. 



Heliotropium limbatum, Benth. Fl. Hartw.p. 20, No. 154; DC. Prodr. 9, p. 543. Murin, 

 Mexico ; Tkurher. 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, li. B. K. 



Heliotropium limbatum, var. confertifoltum : caulibus robustioribus, ramulis suberectis ; foliis 

 lanceolato-linearibus confertissimis subappressis. Plains near Leon Springs, September ; Bige- 



loio. 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 



Nutt. Fl 



appressed and crowded leaves. Flowers pale purple {Gregg). 



Heliotropium tenellum, Torr. in Marcy Report^ t. 14. Lithospermum tenellum, 

 Arlcans. in Trans. Amer. Phil. Soc. n. ser. 5, p. 189. L. angustifolium, Torr. in Ann. Lye. N. 

 Torkj 2, p. 225^ non Michx. (where the nutlets are incorrectly described as smooth and polished.) 

 High plains near Howard's Springs, and Eio San Pedro, western Texas, October ; Schott. (No. 

 1559, Wright.) Western Texas; Marcy. Prairies near San Augustin, Texas; Leavemcorth. 

 On the Eed river, Louisiana ; Dr. Hale. Tennessee ; Mr. Curry. Plant about a foot high, often 

 much branched. Leaves an inch long and 1-1| line wide. Racemes few-flowered, naked or 

 somewhat leafy ; the flowers distant, conpicuously pedicellate. Calyx very unequally 5-parted ; 

 the segments lanceolate-linear, in fruit much longer than the nutlets. Corolla white, 2| 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. 



"odr. 9, p. 553. Heliotropium parviflorum, Linn. Plains 

 ; Bigeloia. Lower Eio Grande, in various places, April 



Heliophy 



Eagle Pass, September, (fruit) ; Bigelow. 



: Schott. Monterey, Mexico ; Dr Edwards, Gregg. We have specimens also from Key 

 West, Florida, collected by Blodgett. 



HELiopHYTUil (Cceloma) molle (d. sp.) I sufTruticosum, griseo-velutinum ; foliis deltoideo-ovatis 

 basi in petiolum abrupte angustatis margine undulatis ; pedunculis terminalibus biSdis spicis 

 conjugatis nudis scorpoideis ; floribus sessilibus ; calycis lobis lanceolatis coroliiB tubo paullo 

 brevioribus ; corolkB lobis obtusis crenulato-undulatis : fructu subgloboso velutino apice integro. 



r 



