93 



from a biennial finely branched tap-root, simple or sometimes 

 branched at the base or near the inflorescence, or both, glabrous, 

 finely ridged: leaves alternate, ascending; blades elliptic-spatu- 

 late to narrowly elliptic, 1-2.5 cm. long, usually acutish, glabrous, 

 paler beneath than above, narrowed at the base but sessile: 

 racemes narrowly-cylindric, closely flowered, i-ii cm. long, 

 continuous: bracts narrowly ovate, acute, longer than the pedi- 

 cels, deciduous: pedicels less than i mm. long, glabrous: sepals 

 (upper one and lower 2) green with pink margins, the upper one 

 oval or ovate, about 1.5 mm. long, the lower ones slightly 

 shorter and narrower: wings (lateral sepals) pink, 3-4 mm., 

 long at maturity, the orbicular or orbicular-oval blades narrowed 

 into a short claw: corolla pink, about 3 mm. long, the lateral 

 lobes broad, rounded, the middle lobe with about 6 minute 

 appendages: anthers scarcely 0.5 mm. long: capsule somewhat 

 quadrate, about 3.5 mm. long, sharply notched at the apex, 

 about as long as the wings or slightly longer, glabrous: seed 

 narrowly obovoid, or slightly cylindric-obovoid, about 3 mm. 

 long, with short ascending hairs, the aril with two appressed 

 lobes reaching to beyond the middle of the seed. Cleistogamous 

 flowers borne on branches from the base of the stem produce 

 capsules similar to those of the upper flowers. — Hammocks on 

 off-shore bars, Coronado, opposite New Smyrna, to Turtle 

 Mound, Florida. Type from Turtle Mound, May 24, 1926. 



This recently discovered species differs from P. polygama in 

 the narrow continuous racemes, the short pedicels which are 

 exceeded by the bracts, the smaller flowers, with scant append- 

 ages on the middle petal, and the wings which are only slightly 

 longer than the capsule or shorter. 



John K. Small 



BOOK REVIEWS 



The American Species of Stipa* 



Professor A. S. Hitchcock has published a noteworthy ac- 

 count of the American species of the large grass genus Stipa. 

 Those of North Amreica are fully described, with citations of 

 synonyms, comments upon the type specimens and copious 

 lists of specimens cited. The type species is Stipa pennata L. 

 of Europe. Forty species are recognized in North America, 



* Contr. U. S. Nat. Herb. 24: Part 7. 1925. 



