132 ONA GRACES. (EVENING-PRIMROSE PA MIL F.) 



shaped, scarcely wing-angled. © ? — Banks, Oswego, New York, to Michigan 

 and northward. July. — Stem 12' -15' high; flowers larger than in No. 9, 

 from which it may not be distinct. 



0. CC. piasieiSa, L. Almost smooth, small ; leaves lanceolate or oblanceolate, 

 mostly obtuse; flowers in a loose and prolonged leafy raceme; petals obcordate 

 (pale yellow), scarcely longer than the stamens ; pods almost sessile, oblong-club- 

 shaped, strongly wing-angled. © or 1J. ? — Dry fields, common northward, 

 and southward along the Alleghanies. June. — Stems mostly simple, 5'- 12 

 high : the corolla £' broad. 



3. GAURA, L. Gaura. 



Calyx-tube much prolonged beyond the ovary, deciduous ; the lobes 4 (rarely 

 3), reflcxed. Petals clawed, unequal or turned to the upper side. Stamens 

 mostly 8, often turned down, as also the long style. Stigma 4-lobed. Fruit 

 hard and nut-like, 3 - 4-ribbed or angled, indchiscent or nearly so, usually be- 

 coming 1 -celled and 1-4-seeded. Seeds naked. — Leaves alternate, sessile. 

 Flowers rose-color or white, changing to reddish in fading, in wand-like spikes 

 or racemes ; in our species quite small (so that the name, from yavpos, superb, 

 does not appear very appropriate). 



1. CI. biennis, L. Soft-liairy or downy (3° -8° high) ; leaves oblong -lance- 

 olate, acute, denticulate ; fruit oval or oblong, nearly sessile, ribbed. (2) — Dry 

 banks, from New York westward and southward ; common. Aug. 



2. G. filipes, Spach. Nearly smooth ; stem slender (2° -4° high) ; leaves 

 linear, mostly toothed, tapering at the base ; branches of the panicle very slen- 

 der, naked ; fruit obovate-club-shaped, 4-angled at the summit, slender-pidicelled. 



— Open places, from Ohio westward and southward. Aug. 



4. JUS SI M A, L. JussiiEA. 



Calyx-tube elongated, not at all prolonged beyond the ovary ; the lobes 4-6, 

 herbaceous and persistent. Petals 4-6. Stamens twice as many as the petals. 

 Pod 4 - 6-celled, usually long, opening between the ribs. Seeds very numerous. 



— Herbs with mostly entire and alternate leaves, and axillary yellow flowers. 

 (Dedicated to Bernard de Jussieu, the founder of the Natural System of Botany 

 as further developed by his illustrious nephew.) 



I. J. deCEsrrens, DC. Glabrous; stem erect (1°- 2° high), branching, 

 winged by the decurrent lanceolate leaves ; calyx-lobes 4, as long as the petals ; 

 stamens 8 ; pod oblong-club-shaped, wing-angled. U — Wet places, Virginia, 

 Illinois, and southward. June -Aug. See addend. 



5. L.UDWIGIA, L. False Loosestrife. 



Calyx-tube not at all prolonged beyond the ovary ; the lobes 4, usually per- 

 sistent. Petals 4, often small or wanting. Stamens 4. Pod short or cylindri- 

 cal, many-seeded. Seeds minute, naked. — Perennial herbs, with axillary 

 (wrely capitate) flowers. (Named in honor of Ludwig, Professor of Botany at 

 Leipsic, contemporary with Linnaeus.) 



