BOEAGINACEAE. 241 



1. CYNOGLOSSUM [Tourn.] L. Annual, biennial, or perennial pubes- 

 cent herbs. Calyx manifestly accrescent. Corolla much longer than the calyx. 

 Style relatively long. Fruit surpassing the calyx. Sum. 



Stem copiously leafy to the top : corolla slightly longer than the calyx : nutlets flat. 



1. C. ofllcinale. 

 Stem terminated by a long peduncle : corolla much longer than 



the calyx: nutlets convex. 2. C. virginicum. 



1. C. officinale L. Stems 2-6 dm. tall: leaf -blades oblong to linear-oblong or 

 linear-lanceolate, 5-15 cm. long: calyx-lobes becoming 6-8 mm. long or more: 

 corolla reddish-purple or rarely white, mostly 8-10 mm. wide; lobes reniform: 

 nutlets smooth between the spines. Common, in dry soil, on roadsides, and in 

 thickets. Nat. of EU. HOUND 'S-TONGUE. 



2. C. virginicum L. Stems 2-11 dm. tall: leaf -blades oval to oblong, 8-32 

 cm. long: calyx-lobes becoming 3-4 mm. long: corolla white or purplish, 7-8 

 mm. wide ; lobes ovate : nutlets coarsely wrinkled between the spines. Bather 

 common, in dry soil, on roadsides, and in thickets. WILD-COMFREY. 



2. LAPPITLA [Rivinius] Moench. Annual, biennial, or perennial, often 

 hirsute or hispid, herbs. Calyx scarcely accrescent : lobes spreading at maturity. 

 Corolla scarcely as long as, or a little longer than the calyx. Style relatively 

 short. Fruit much longer than the calyx. 



1. L. virginiana (L.) Greene. Plants 3-9 dm. tall: leaf -blades oblong or 

 elliptic to oblong-lanceolate, the lower ones 10-20 cm. long: calyx-lobes becom- 

 ing 2-2.5 mm. long: corolla-tube about 1.5 mm. long, the appendages reni- 

 form : fruit about 4 mm. wide ; nutlets papillose and spiny. Common, in 

 thickets. Sum. BEGGAR 'S-LICE. STICK-WEED. BUR-SEED. 



3. MERTENSIA Roth. Perennial glabrous (ours) herbs. Calyx scarcely, 

 if at all, accrescent. Corolla showy, conspicuously longer than the calyx. 

 Style and free portion of the filaments elongate. Fruit much longer than the 

 calyx. 



1. M. virginica (L.) DC. Stems often clustered, 2-6 dm. tall: leaves 5-20 

 cm. long; blades oblong-elliptic to oval: calyx 2-3 mm. long, becoming 5-6 

 mm. long; lobes oblong to lanceolate or ovate: corolla blue or rarely white, 

 2.5-3 cm. long, the cup-like limb 10-15 mm. wide, shallowly lobed: nutlets 

 ovoid, 2.5 mm. long. Frequent, in rich woods and low grounds. Spr. 

 LUNGWORT. VIRGINIA-COWSLIP. 



4. MYOSOTIS [Rupp.] L. Annual, biennial, or perennial, pubescent 

 herbs. Calyx slightly accrescent. Corolla manifestly longer than the calyx. 

 Style and free portions of the filaments short. Fruit surpassed by the calyx. 

 Spr. and sum. FORGET-ME-NOT. SCORPION-GRASS. 



Calyx open at maturity, pubescent with straight hairs : perennial plants. 



1. M. laxa. 

 Calyx closed at maturity, pubescent with hooked hairs : annual or 



biennial plants. 

 Pedicel longer than the mature calyx : style slender, about as 



long as the ovary : calyx regular. 2. M. arvensis. 



Pedicel shorter than the calyx : style stout, very short : calyx 



2-lipped. 3. M. virginica. 



1. M. laxa Lehm. Stems 1-5 dm. long: leaf -blades spatulate to oblong-lance- 

 olate: pedicels 5-10 mm. long: calyx-lobes triangular to triangular-lanceolate: 

 corolla mainly pale-blue ; lobes about 1 mm. long : nutlets about 1 mm. long. 

 Common, in spring-runs and muddy places. 



Lancaster County Flora 16. 



