riGWOUT FA>riLY. 321 



o o stamens with good anthers only '2, a pair of sterile ones or abortive filaments gen- 

 erallfi present also ; flower.-i Diitnll ; atly.c rt parted ; corolla clipped; leaves 

 ojipofite, irilh niiir/lejloirers ia the axil of the upper ones ; peduncles simple and 

 hracthss. 



20. ILYSANTHES. Spreadinj,' little herbs. T'pper lip of the short corolla erect and 2- 



lobed ; the lower larger, spreading, 3-cleft. Upper pair of stanien.s with good anthers, 

 included in the tube of the corolla ; lower pair borne in the throat and protruded, 

 2-forked, without anthers. Stigma 2-lii)ped. Pod many-seeded. 



21. GRATIOLA. Low herbs. Tipper lip of the corolla either entire or 2-cloft ; lower 3- 



cleft. Stamens included; the upper pair with good anthers; the lower pair short, 

 will\ rudiment of antliers or a mere naked filament, or none at all. Stigma 2-lii)[)ed. 

 rod many-seeded. A pair of bracts at the base of the calyx. 



o o Stamens with anthers 4, the fifth stamen present as a barren filament or a scale; 

 calyx i'-parted or of ;> imbricated sei)als ; stigma simple; leaves chiefly oppo- 

 site ; flowers in the axils of the tipper leaves, or when these are reduced to bracts 

 forming a terminal panicle or raceme; peduncles few-flowered, or when one- 

 flowered bearing a pair ofbracttets, from the axils of wliich floivers may spring ; 

 pod many-seeded. 



X Rudiment of the fifth stamen a little scale at the summit of the tube of the corolla. 



22. SCROPHULAIMA. Homely and rank erect herbs. Corolla small, with a globular or 



oval tube, and a short border composed of 4 short erect lobes and one (Ihe lower) 

 Bpreading or retle.ved. Fertile stamens short and included. 



X X Rudiment an evident filament. 



23. CHELONE. Low upright smooth herbs, with flowers sessile in si)ikes or clusters in 



the axils of the upper leaves, and accompanied by closely imbricated concave round- 

 ish bracts and bractlets. Corolla short-tubular and inflated, concave underneath, 

 with the 2 broad lips only slightly open ; the upper arched, keeled in the middle, 

 notched at the apex ; the lower one woolly bearded in the throat and 3-lobed at the 

 end. Filaments and anthers woolly ; sterile filament shorter than the others. Seeds 

 winged. 



24. PENTSTEMON. Herbs (or a few shrubby at base), with mostly upright stems branch- 



ing only from the base, and panicled or almost racemed flowers. Corolla tubular, 

 bell-shaped, funnel-form, etc., more or less 2-lipped, o[)en-mouthed. Sterile fila- 

 ment conspicuous, usually about as long as the anther-bearing ones. (Lessons, Fig. 

 264.) Seeds wingless. 



25. RUSSELLIA. Rather shrubby spreading jilants, or with pendulous angular branches ; 



the flowers loosely i)anicled or racemed. Corolla tubular with 5 short spreading 

 lobes, the 2 upper a little more united. Sterile filament small and inconspicuous 

 near the base of the corolla. Seeds wingless. 



II f I' Neither spur nor sac at base of the corolla, the narrow laterally compresi;ed or 

 infolded upper lip of which is helmet-shaped or arched, entire or minutely 

 notched, and inclosing the 4 stamens ; no sterile filament. Often showy 

 but uncultivable plants. 



o Cells of the anther unequal. 



26. CASTILLEI.V. Herbs with simple stems, alternate leaves, some of the ui)per, with 



flowers chiefly sessile in their axils, colored like petals, and more gay than the 

 corollas. Calyx tubular, flattened laterally, 2-4-cleft. Corolla tubular, with a long 

 and narrow conduplicate erect upper lij), and a very short S-lohed lower lip. Pod 

 many-seeded. ^ ^ ^^^^^ ^^ ^^^^ ^^^^,^^^. ^^^^^^ 



27. SCHWALBEA. Upright simple and leafy -stemmed herb, with a loose spike of rather 



showy dull p\irplish or yellowish flowers and alternate sessile and entire leaves. Caly.x 

 oblique and tubular, 10-12-ribbed and 5-toothed, the teeth unequal. Upper lip of 

 corolla oblong and entire. Pod many-seeded. 

 OR.^y''* F. K. * O. UOT. — 21 



