620 ADDITIONS AND CORRECTIONS. 



wards ; the other three oblong, united at the very base. Filaments (more or less) 

 adnate to near the throat or the upper part of the tube of the corolla, then free or 

 further adnate to one side, and monadelphous : anthers oblong, united, three of 

 them naked, two tipped with a small tuft of very unequal rigid bristles. Stigma, 

 ovary, and apparently capsule of Lobelia, of which the plant has the habit, except 

 in the remarkably long tube of the corolla. Name in acknowledgment of the 

 services to North American Botany rendered by the discoverer, Dr. Edward Palmer, 

 who more than any one else has explored the botany of the region to which it 

 belongs, viz. Arizona, the southern frontiers of the State of California, and Lower 

 California. Proc. Am. Acad. xi. 80. 



1. P. debilis, Gray. Herb a foot or two high, probably from a perennial root, 

 smooth and glabrous except the inside of the corolla ; stem weak and slender, sim- 

 ple or at length loosely branched : leaves thin (the lowest not seen) : the cauline 

 ones linear-lanceolate, 2 or 3 inches long, entire or rarely a little denticulate, sessile, 

 alternate, above gradually diminished into slender bracts of the several-flowered 

 leafy raceme : limb of the corolla bright blue ; the tube whitish, half or three 

 fourths of an inch long, hairy inside. 



Var. serrata, Gray. Minutely pubertilent, at least toward the summit and the 

 tube of the corolla : leaves almost all acutely serrate, or the upper merely denticu- 

 late ; the lower spatulate or obovate (one or two inches long, sometimes an inch 

 broad) : flowers rather few and crowded. 



Great Canon of the Tantillas Mountains, in Lower California, Sept. 1875, Dr. E. Palmer. The 

 variety, on wet sandstone rocks in the valley of Ojai Creek, Ventura Co., July, 1875, Dr. Roth- 

 rock in Wheeler's Exped. The base of the corolla-tube inclines to break up in age as it were 

 into claws of the five component petals, as in Lobelia splendens, &c. Then the adnate fila- 

 ments become free below, remaining coalescent above. 



Page 476. 1. ASCLEPIAS. 



7. A. leucophylla, Engelm., var. obtusa, Gray. Wool deciduous, hardly 

 any on the outside of the corolla : leaves oblong, all the lower very obtuse or trun- 

 cate : hoods rather broader and truncate. 



Bartlett's Canon, near Santa Barbara, Rothrock in Wheeler's Exped., 1875. The hoods in this 

 species and in A. eriocarpa have a lamelliform fold or duplication on each side below near the 

 interior margin. 



Page 478. 4. LACHNOSTOMA, HBK. 



Calyx, corolla, fruit, &c., nearly as in Sarcostemma. Crown (in the following 

 species) consisting of a hood-like appendage behind each anther, not unlike that of 

 Asdepias. Anthers short, and the pollen-masses horizontal, otherwise nearly as in 

 Asclepias. A tropical and subtropical American genus of the Gonolobus tribe, 

 chiefly of twiners ; mostly with opposite cordate and petioled leaves, and small 

 dull-colored flowers. Benth. & Hook. Gen. ii. 767. 



1. L. hastulatum, Gray. A slender twining plant, herbaceous or nearly so, 

 clothed with a fine and dense soft pubescence : leaves hastate, 2 or 3 lines long, on 

 a slender petiole : flowers solitary and scattered, nearly sessile, whitish : calyx 

 5-parted, the divisions linear : corolla 5-parted, the divisions oblong-linear, almost 

 glabrous inside : hoods behind the anthers oblong-obovate, white, acutely 3-toothed 

 at the apex, and with a short triangular-subulate internal horn : follicles fusiform, 

 beset with a few small and soft processes. Proc. Am. Acad. xi. 87. 

 Tantillas Canon, within the borders of Lower California, Dr. E. Palmer. 



