OP ARTS AND SCIENCES. 417 



a biennial or perennial, with numerous nearly erect stems 1 or 2 feet 

 high, has a round-elliptical capsule, and a curved oblong seed densely 

 covered with loosely appressed hairs, a rounded pubescent caruncle 

 pitted on the inner side, and the lateral appendages half as long as the 

 seed. There are no specimens in herb. Gray from west of the Missis- 

 sippi ; it has been credited to Mexico and Guatemala, but probably 

 erroneously. P. hicolor, HBK., is usually referred as a synonym to 

 P. alba, but by Hemsley to P. Boykinii, The flowers are scarcely 

 more than half the size of those of P. alba and are reddish when dried. 

 The reference even to P. alba may still be considered doubtful. 



Krameria bicolor. a shrub, 3 to 5 feet high, with green bark, 

 the younger branches covered with a dense spreading pubescence : 

 leaves oblong-lanceolate to linear, sessile, 4 to 8 lines long, short-villous 

 above, the hairs beneath longer and silky : pedicels axillary, bibrac- 

 teolate : sepals acuminate, 3 to 5 lines long ; petals and stamens free, 

 the lower fleshy tuberculate petals about equalling the upper, orbicular, 

 1^ lines long; claws of the upper petals green and thickened, the 

 limb purple, the middle one slightly dilated, the outer obliquely reni- 

 form : fruit globose, 4 lines broad, densely covered with spreading 

 hairs and armed with rather stout glochidiate jirickles. — Hacienda San 

 Jose (37). Differing from K. cunescens especially in its pubescence, 

 petals, and the stouter pi-ickles of the fruit. 



Drymaria tenella, Gray. — Same locality (59). 



PoRTULACA PILOSA, Linn. ?, with submoniliform tuberous roots. — 

 Same locality (79). 



FouQuiERA SPINOSA, HBK.? — Hacienda San Miguel (228). Like 

 Sonora specimens collected by Thurber, but the panicle more open and 

 the pedicels longer than shown in the original flgure. 



Malvastruh TRicuspiDATUM, Gray, var. bicuspidatum. The 

 ventral cusp of the carpel obsolete; shrubby, the flowers opening at 

 night. — Same locality (8). 



Malvastrum jacens. Annual, decumbent or nearly prostrate, 

 the stems and petioles stellate-pubescent and hispid with spreading 

 sub-fascicled hairs : leaves triangular-ovate to round-reniform, ti-un- 

 cate at base, 3-5-lobed, irregularly laciniate-crenate, 1 or 2 inches long, 

 the floral much smaller : flowers on short slender pedicels in the axils 

 of the stem or of short branches ; calyx cleft to below the middle, 

 with filiform bractlets ; petals purplish, equalling the calyx (2 lines 

 long) : carpels 8, depressed and rounded, not beaked, strongly rugose. 

 — Norogachi (430) ; also 90 Parry & Palmer, from near San Luis 

 Potosi. 



VOL. XXI. (n. s. xiii.) 27 



