518 ONAGRACEiE. Gaura. 



paniculate at the summit ; the branches of the panicle often leafless and 

 almost filiform. Flowers loose, rather smaller than in G. biennis : petals 

 white, turning reddish. Anthers linear-oblong. — In this, as in the other spe- 

 cies, the form of the fruit varies considerably in the different stages of growth. 

 In our var. 0. the flowers are nearly as large as in G. biennis, and the leaves 

 often assume a reddish tint. It differs from G. longiflora, Sjmcli, only in the 

 larger flowers and the shorter tube of the calyx as compared with the seg- 

 ments. The length of the pedicel is somewhat variable. 



^ 4. G. sinuata (Nutt.) : stem suffruticose and branching at the base, naked 

 above, glabrous ; leaves lanceolate-linoar, acute, remotely and acutely 

 sinuate-toothed, glabrous; flowering branches slender, nearly simple, naked ; 

 flowers loose, pedicelled ; segments of the calyx much longer than the ob- 

 conic tube ; petals oblong-obovate, on very slender claws, much shorter than 

 the calyx-segments. — NulL! in DC. 2>Todr. 3. p. 44 ; Spach ! I. c. 



Arkansas! Nuttall! T e-aas, Dru7nmond ! — Leaves rather thick, veinless, 

 with one or two salient teeth on each side. Bracts minute, cuspidate. Ovary 

 linear-oblong. — The stems are short, diffiise or decumbent, and very leafy, 

 sending off" slender and quite naked flowering branches 8-12 inches in length. 

 We have not seen the fruit. Mr. Nuttall states it to be lanceolate, and acu- 

 minate at each end. 



5. G. villosa (Torr.) : stem suffruticose and with numerous short branches 

 at the base, canescently puberulent, witla villous hairs intermixed ; leaves of 

 the short sterile branches very numerous, tomentose-canescent, lanceolate, 

 remotely and acutely toothed, or rarely entire, acute ; flowering branches 

 naked and elongated, glabrous, often paniculate; bracts subulate, minute, 

 much shorter than the ovary ; calyx canescent ; the segments twice the 

 length of the somewhat ventricose tube, much longer than the petals; young 

 fruit linear, 4-sided, slightly attenuate at each end, on a filiform pedicel, at 

 length reflexed. — Torr. ! in anv. lye. New York, 2. p. 200. 



Near the sources of the Canadian River, Dr. James ! Arkansas? 3Ir. 

 Beyrich ! — Stem about 3 feet high. Leaves an inch or more in length, 

 equally pubescent on both sides. Flovv-ering branches often virgately 

 branched above, perfectly leafless. Racemes loosely flowered ; the flowers 

 as large as in G. sinuata. Ovary longer than the free portion of the calyx- 

 tube, about the length of the pedicel ; the calyx-segments about the length of 

 the tube taken with the ovary. Petals rose-color, with very slender claws. 

 Anthers linear. Immature fruit very slender, about 4 lines long. The 

 floral organs are sometimes ternary. 



6. G. coca'nea (Nutt.) : somewhat canescent ; stems suffruticose and fas- 

 tigiately branched from the base, very leafy, ascending ; leaves lanceolate,, 

 repand-denticulate or entire, closely sessile ; flowers in simple spikes termi- 

 nating the leafy branches ; bracts linear, rather persistent, longer than the 

 ovaries ; segments of the calyx linear-oblong, rather shorter than the narrow- 

 ly infundlbuliform tube, about the length of the roundish unguiculate petals; 

 fruit elliptical, sessile, short, terete, 4-sided above. — Nutt. ! in Frasefs cat., 

 cV gen. 1. p. 249 ,• Pursh, fl. suppl. 2. p. 733 ; DC. I. c. ; Torr. ! in ann. 

 lye. New York, 2. p. 200 ; Lehm. ! in Hook. I. c. Schizocarya? crispa, 

 Spaefi, I. c. 



13. puberulent, but not canescent ; leaves mostly smaller, often entire ; 

 segments of the calyx Unear; petals spatulate-obovate. — G. coccinea /?. inte- 

 gerrima, Torr.! I.e. G. marginata, Lehm.! I.e. 



y. stem glabrous below ; leaves Unear, mostly entire, small, and, with the 

 branches, puberulent. — G. parvifolia, Torr. ! I. c. 



6. almost glabrous ; leaves narrowly lanceolate, undulate ; ovaries nearly 

 glabrous. — G. glabra, Lehm. ! I. c. 



