302 FLORA OF TEXAS. 



as long as the calyx ; lobes of the small (3"-4") blue and 

 white corolla rounded; spur filiform, curved, as long as 

 the pedicels. (Antirrhinum Canadense, L.) Biennial. 

 Stem l°-2° high. 



MIMULUS, L. MONKEY-FLOWEE. 



Calyx tubular, 5-angled, sharply 5-toothed ; corolla bila- 

 biate ; the upper lip 2-lobed, erect or reflexed ; the lower 

 3-lobed, spreading; stamens 4, didynamous; anther-cells 

 somewhat confluent ; stigma ovate, 2-lipped ; capsule \oc\\- 

 licidally 2-valved, many-seeded. — Erect smooth perennial 

 herhs, with opposite leaves, dan axillary -^^wx^Iq flowers. 



M. ALATUS, Ait. Stem square, with winged angles; 

 leaves oblong-ovate, acuminate, serrate, tapering at the 

 base into a petiole; pedmicles shorter than the flotvers. 

 Stem 2° high ; leaves 2-5' long ; calyx-teeth small. 



HERPESTIS, Gsertn. 



Caly:d 5-parted, the three outer lobes, especially the 

 upper one, broader ; corolla bell-shaped, 5-lobed or bila- 

 biate, with the upper lip 2-lobed or emarginate, the lower 

 3-lobed; stamens ^y didynamous; anther-cells contiguous 

 or divaricate ; style dilated and flattened at the apex ; caj)- 

 sule 2-valved, many-seeded. — Low herbs, w4th opposite 

 leaves ; floioers opposite, axillary, or in leafy terminal ra- 

 cemes. 



* stems 4-angled; leaves serrate ; peduncles 'i-bracted at the base; exterior calyx- 

 lobes oblong ; corolla white. 



H. NiGRESCENS, Benth. Smooth ; stem erect, simple or 

 branched; Zeave.s oblong or obi on g-obovate, rather obtuse, 

 serrate above the middle ; lower peduncles as long as the 

 leaves, the upper much longer ; tube of the corolla striped 

 with blue; the upper lip rounded. Stem 1°-H° high; 

 leaves l'-2' long. 



