Ill 



posteriorly; pubescent within at base 

 of anterior lobes. No bractlets below 

 calyx. 

 Perfect stamens four, with slender straight 

 filaments. Corolla 15-30 mm. long, 

 its orifice nearly closed by the raised 

 anterior Up; the posterior lobes round- 

 ed and nearly equaling anterior. Style 

 without tubercle-like base. Capsule 

 loculicidal, tardily somewhat septicidal. 

 Sepals united over one-half length. 

 Perfect stamens two; the antero-lateral 

 filaments fused with corolla ridges, 

 from near apex of which abruptly 

 upcurving. Corolla lavender, 2-10 

 mm. long, its orifice open; the pos- 

 terior lobes acute and shorter than 

 the anterior, or else wanting. Style 

 with white tubercle-like base. Cap- 

 sule septicidal, the thin plate-like 

 septum persisting. 

 Corolla 6-10 mm. long, with two pos- 

 terior lobes developed. Postero- 

 lateral stamens perfect, antero- 

 lateral filaments without anthers. 

 Sepals five, united at base. Plants 

 erect or ascending, with leaves 1-3 

 cm. long. 

 Corolla 2 mm. long, with two posterior 

 lobes lost. Postero-lateral stamens 

 lost, antero-lateral filaments with 

 anthers. Sepals four (the posterior 

 lost), united nearly four fifths then- 

 length. Plant repent, with leaves 

 .3-5 cm. long. 

 DD . Leaves alternate. Corolla with a spur at 

 the base of the anterior petal. Stigma capi- 

 tate. Capsule loculicidal, the septum with 

 adjacent capsule-wall persisting, the remaining 

 wall splitting irregularly. 



AA. Corolla with the anterior lobes external in the bud. 

 (Rhinanthoideae. ) 

 B. Stamens two, the postero-laterals present; the 

 anterolaterals completely lost. Antero-!ateral 

 lobes of corolla external in bud. Not parasitic. 

 Sepals four, the posterior lost. Posterior lobes of 

 corolla completely fused. 



7. Mimulus. 



8. Ilysanthes. 



9. Hemianthns. 



Antirrhineae 

 Linaria. 



VI \'er;iniceae. 



