KHINANTHACEAE 1075 



11. Dasystoma laevigata Kaf. Perennial, glabrous, pale green. Stems 3-12 dm. 

 tall, simple or sparingly branched : leaf -blades lanceolate to elliptic, 3-12 cm. long, acute 

 or acuminate, merely undulate or repand or incised on the lower part of the stem : calyx 

 longer than the pedicel ; tube campanulate ; lobes triangular-lanceolate or lanceolate, as 

 long as the tube or longer: corolla pale or lemon yellow, 2.5-3 cm. long : capsules ovoid, 

 10-12 mm. long. 



In open woods or thickets, Pennsylvania to Michigan, Georgia, Alabama and Tennessee. Summer. 



33. OTOPHYLLA Benth. 

 Annual caulescent herbs, with rigidly pubescent foliage. Leaves opposite : blades 

 entire or pinnately divided, all or some of them auricled at the base, sessile. Flowers in 

 terminal spikes. Calyx of 5 partially united sepals. Corolla purple or rarely white : tube 

 broadly dilated at the throat : lobes spreading. Stamens 4, didynamous, included : fila- 

 ments glabrous or nearly so : anthers of the shorter stamens much smaller than the others. 

 Style slender. Stigma entire. Capsule oval or globose-oval, often minutely pointed. Seeds 

 angled. 



Leaf-blades or some of them with 2 auricles at the base : corolla less than 2 mm. long : capsules over 

 10 mm. long. 1- 0. auriculata. 



Leaf-blades parted into 3-7 linear segments : corolla over 2 cm. long : capsules less 



than 10 mm. long. 2. 0. densiflora, 



1. Otophylla auriculata (Michx.) Small. Foliage hirsute. Stems 3-6 dm. tall, 

 simple or sparingly branched : leaf-blades lanceolate or ovate-lanceolate, 1-4 cm. long, 

 acute, the upper ones or sometimes all with lanceolate auricles at the base : spikes inter- 

 rupted, not dense : calyx-tube campanulate, the lobes lanceolate or oblong-lanceolate, often 

 longer than the tube : corolla less than 2 cm. long : capsules oval, 11-13 mm. long. 



In low grounds or on prairies, New Jersey to Minnesota, North Carolina and Kansas. Summer. 



2. Otophylla densiflora (Benth.) Small. Foliage hispid. Stems 2-5 dm. tall, 

 usually branched above : leaf-blades 1.5-3 cm. long, parted into 3-7 narrowly linear seg- 

 ments, rigidly ciliate : spikes continuous, dense : calyx-tube campanulate, the lobes lanceo- 

 late, folded, longer than the tube : corolla over 2 cm. long : capsules oval, about 8 mm. 

 long. 



On prairies, Kansas, Oklahoma, the Indian Territory and Texas. Spring and summer. 



34. GERARDIA L. 



Annual or perennial caulescent usually slender herbs. Leaves mainly opposite : blades 

 narrow, or scale-like, entire. Flowers solitary in the axils of narrow bracts. Calyx of 5 

 sepals usually united to beyond the middle, the lobes tooth-like. Corolla often rose-pur- 

 ple, sometimes white or yellowish pink, 2-lipped, the lower lobes exterior in the bud. 

 Stamens 4, didynamous, included : filaments pubescent : anthers all alike ; sacs obtuse or 

 mucronate at the base. Style filiform. Capsule rounded at the apex, loculicidally dehis- 

 cent. Seeds mostly angled. 



Perennial plant, with horizontal rootstock. 1. G. lini/olia. 



Annual plants, with fibrous roots. 



Pedicel shorter than the calyx or the calyx and the capsule. 



Leaves above the base of the stem represented by minute scales. 



Corollaoverl5mm.long : flowers approximate : pedicels stout, 1-3 mm. long. 2. G. aphylla. 

 Corolla less than 15 mm. long : flowers remote : pedicels filiform, 5-10 mm. 



long. 3. G.Jilicaulit. 



Leaves normal, never scale-like. 



Calyx-lobes about as long as the tube. 4. G. heterophyila. 



Calyx-lobes much shorter than the tube. 

 Corolla about 2 cm. long or longer. 



Calyx-tube turbinate : calyx-lobes % as long as the tube : capsules 



elliptic or elliptic-ovoid. 5. G.aspera. 



Calyx-tube campanulate : calyx-lobes minute or less than % as long 

 as the tube : capsules globular. 

 Stem-leaves with conspicuous clusters of smaller leayes in their 



axils. 6. G.fasciculata. 



Stem-leaves without clusters in their axils. 



Calyx-lobes mostly 1.5-2 mm. long : leaf-blades flat or slightly 



revolute. V. G. purpurea. 



Calyx-lobes mostly 1 mm. long or shorter : leaf-blades filiform. 8. G. Flukenetii. 

 Corolla about 1.5 cm. long, or shorter. 



Calyx-lobes acute or acuminate : plants not succulent. 

 Blades of stem-leaves linear, linear-spatulate or filiform. 



Capsules 2-4 mm. in diameter : calyx-lobes mostly 0.5-1 mm. long. 



