523 BOTANICAL GAZETTE. 



that the extended growth of the segment is in accordance with that of 

 the rachis. This would serve to make plainer the distinction between 

 the frond and the leaf, in which the form of the skeleton is determined 

 by the growth of the parenchyma, which demands support. 



Since writing the above, I have found among my specimens 

 of Pella'a JVrightiaiia, a number of specimens of that very 

 rare fern (in the United States), F. iernifolia, Link. Upon a 

 careful examination of this fern there seems to be no doubt of the 

 suggestion of Prof. Eaton, that it and P. lVrii:;/itia/ia belong to the 

 same species. I shall, therefore, distribute it among my sets, as far 

 as the specimens w 11 go, as P. tenii folia. Link, and P. lVrig/itia?ia, 

 Hooker, as var. Wris;htiana of the former species. — Henry H. 



RUSBY. 



Some Additions to the Nortli American Flora, by Dr. G. 



Engelmann. — Uicentra ochroleuca, n. sp. Stem erect, 1-4 feet 

 high, leafy, leaves glaucous, large (lower ones a foot or more long), 

 3-pinnate, ultimate divisions deeply cleft into lanceolate-linear lobes ; 

 flowers panicled on very short pedicels, about 15 lines long, ochroleu- 

 cous; membranaceous sepals suborbicular; exterior petals slightly 

 saccate at base, upwards narrower, somewhat concave below the acute 

 tip, and scarcely spreading; inner petals widened above into a deep 

 purple circular tip, crested with two very broad flat and elongated 

 appendages; stamens subulate scarcely cohering. 



In valleys of the Santa Monica Mountains near Los Angeles, 

 Cal., where it grows with the rather rare Ceanothiis spinosus, the root- 

 stock of which, named red-wood, furnishes the principal fire- wood 

 there.-Together with D. chrysantha t\\\?, handsome species constitutes 

 the subgenus Chrysocapnos, in which the crest, single and inflated in 

 the true Diceutme, is formed of two distinct lamellae, flat and large in 

 our species, short and curly in D. chrysantha. This latter is a coarser 

 plant with much smaller golden-yellow flowers (6-9 lines long) and 

 deeply concave, spreading outer petals. 



TsuGA Caroliniana, n sp. A small tree of the southern Alle- 

 ghany Mountains with larger (6-8 hnes long, ^-i line wide), darker 

 leaves than the common Hemlock spruce, retuse or often notched at 

 tip, without stomata above, beneath with two pale bands, each with 

 7 or 8 series of stomata ; strengthening cells under the epidermis on 

 keel, midrib and edges; cones 12-14 I'^^es long, scales oblong, much 

 longer than wide, in 8-13 order, spreading at right angles after matur- 

 ity, broad bracts slightly and obtusely cuspidate ; seeds (2 lines long) 

 with numerous (15-20) small oil vesicles on the underside, twice 

 shorter than wing. 



Mountains of North and South Carolina, on dry slopes and 

 ridges. — Smaller, stouter branched than T. Canaden sis, irom which it is 

 always readily distinguished by its larger, darker, glossier, more 

 retuse leaves and by its larger cones with wide spreading scales. It 

 was first noticed in the mountains of South Carolina by Prof. L. R. 

 Gibbes of Charleston in 1850, who sent specimens to Prof. A. Gray 

 in 1856 and in an accompanying letter suggested for it the name of 



