520 BORRAGIN"ACE,E. Coldenia. . 



10. Pectocarya, Nutlets divergent and horizontal in pairs, oblong, somewhat boat-shaped by 



a wing-like toothed or pectinate border, which bears more or less hook-tipped bristles. 

 Flowers very small, white, scattered along leafy branches. 



* * Fertile nutlet invested by two united and cornute-appendaged divisions of the very unequal 

 calyx ; the others sterile : seed erect and radicle inferior ! 



11. Harpagonella. Fructiferous portion of the calyx bur-like, about 7-horned, the horns or 



processes armed with hooked bristles. Flowers very small, scattered along the leafy stem 

 and branches. 



1. COLDENIA, Linn. 



Calyx 5-parted or deeply 5-cleft (or in one species 4-parted). Corolla short- 



funnelform or salverform ; the lobes rounded and usually between convolute and 



imbricated in the bud (one lobe wholly exterior). Anthers oval. Style 2-cleft or 



2-parted : stigmas small, capitate. Ovary more or less 4-lobed, in fruit forming 



4 or fewer one-seeded nutlets. Seeds destitute of albumen : cotyledons thick. — 



Low herbs or suffrutescent plants, with mostly white small floweis in sessile 



terminal and lateral clusters. — DC. Prodr. ix. 558 ; Gray, Proc. Am. Acad. v. 



340, viii. 292, & x. 48. Tiquilia, Pers. Galapagoa, Hook. f. Stegnocarpus, 



Ptilocalyx & Eddya, Torr. & Gray, Pacif. P. Rep. ii. 169. 



The original species is East Indian and also widely dispersed over the warmer parts of the 

 world ; the sections Stegnocarpus and Ptilocalyx, and also Eddya, inhabit the southern borders 

 of the United States from Arizona or New Mexico eastward (one of them C. hispidisshna, 

 which has narrow and excessively hispid leaves, &c. , may approach the eastern borders of our 

 State) ; the section Tiquilia consists of two Western South American species ; and finally ours 

 form the section Tiquiliop>sis, characterized by scales or plaits at the base of the corolla- 

 tube, and cotyledons either horseshoe-shaped and surrounding or else entire and incumbent on 

 the radicle. 



1 . C. Nuttallii, Hook. Annual, prostrate and many times forked, hoary-pubes- 

 cent and sparingly hispid : leaves ovate or roundish, about 2 lines long and on 

 petioles of equal or greater length, marked with 2 or 3 strong veins on each side of 

 the midrib : flowers densely clustered in the forks of the stem : lobes of the 5-parted 

 calyx linear, sparsely hispid, equalling the tube of the pinkish or white corolla : 

 filaments shorter than the anthers, inserted high up on the corolla-tube, at the base 

 of which within are 5 very short adnate scales : style almost 2-parted : nutlets ob- 

 long-ovate, smooth and shining, rather thin, marked with a linear ventral scar : 

 embryo straight : cotyledons elongated horseshoe-form, the 4 long basal lobes almost 

 enclosing the long radicle. — Benth. in Kew Jour. Bot. iii. 296; "Watson, Bot. 

 King Exp. 248. Tiquilia hrevifolia, Kutt. in herb.; Torr. Bot. Mex. Bound. 136, 

 & Bot. Wilkes Exp. xvii. 411, t. 12 A. 



Arid plains, along the eastern borders of the State (Anderson, Torrey, &c), extending through 

 the arid interior district from Washington Territory to Arizona, and eastward to Wyoming 

 Territory. 



2. C. Palmeri, Gray. Perhaps perennial and slightly woody at base, whitened 

 with a fine and close pubescence, not hispid : branches ascending : leaves obovate 

 or ovate, 2 to 4 lines long and with shorter petioles, strongly marked or lineate by 

 about 6 pairs of straight veins : lobes of the 5-cleft calyx lanceolate, about half the 

 length of the tube of the (bluish) corolla, which bears 5 salient plaits extending 

 upwards quite to the base of the slender filaments : nutlets only one or two ripen- 

 ing, these globular and with a round scar : cotyledons entire and thick, incumbent 

 on the radicle ! — Proc. Am. Acad. vii. 292, & x. 49 ; Watson, Bot. King Exp. 

 247. Tiquilia hrevifolia, var. ptlicata, Torr. Bot. Mex. Bound. 136. 



Sand-hills, along the Rio Colorado and the lower part of the Mohave, and adjacent parts of 

 Arizona, Cooper, Emory, Schott, Palmer. Mr. Watson found evident albumen ; but in mature 

 seeds there is merely a trace. 



