TOO 



LABIATAE (MINT FAMILY^ 



16. LAMIUM L. DEAD NETTLE 



Calyx tubular-bell-shaped, about 5-nerved, with 5 nearly equal awl-pointed 

 teeth. Corolla dilated at the throat; upper lip ovate or oblong, arched, nar- 

 rowed at the base ; the middle lobe of the spreading lower lip broad, notched 

 at the apex, contracted as if stalked at the base ; the lateral ones small, at the 

 margin of the throat. Decumbent herbs, the lowest leaves small and long- 

 petioled, the middle heart-shaped and doubly toothed, the floral subtending the 

 whorled flower-cluster. (Name from Xai^i6s, throat, in allusion to the ringent 

 corolla.) 



* Annuals or biennials, low ; flowers small, purplish, at most 1.5 cm. long. 



1. L. AMPLEXICAULE L. (HENBiT.) Leaves rounded, deeply crenate-toothed 

 or cut, the upper ones clasping ; corolla elongated, upper lip bearded, the lower 

 spotted, lateral lobes truncate. Waste and cultivated places. Apr.-Oct, 

 (Nat. from Eu.) 



2. L. PURPUREUM L. Leaves roundish or oblong, heart-shaped, crenate- 

 toothed, allpetioled. N. E. to N. C. Apr., May. (Nat. from Eu.) 



* * Perennial, taller; flowers larger. 



3. L. ALBUM L. Hairy ; leaves ovate, heart- 

 shaped, petioled ; calyx-teeth very slender, spread- 

 ing ; corolla white, the tube curved upward, 

 obliquely contracted near the base, where there is 

 a ring of hairs inside ; lateral lobes of lower lip 

 bearing a long slender tooth. Roadsides and 

 waste places, mostly escaped from cultivation. 

 May-July. (Introd. from Eu.) FIG. 894. 



4. L. MACULATUM L. Like the last, but leaves 

 more frequently marked with a white spot on the 

 upper face, and flowers purplish or white, with 

 the ring of hairs transverse instead of oblique. 



Sparingly escaped to roadsides and thickets. May-July. (Introd. from Eu.) 



17. LEONtTRUS L. MOTHERWORT 



Calyx 5-nerved, with 5 nearly equal teeth. Upper lip of the corolla oblong 

 and entire, somewhat arched ; the lower spreading, 3-lobed, its middle lobe 

 larger, narrowly oblong-obovate, entire, the lateral ones oblong. Upright herbs, 

 with cut-lobed leaves, and close whorls of flowers in their axils ; in summer. 

 (Name from \uv, a lion, and ovpd, tail, i.e. Lion's-tail.) 



1. L. CARDIACA L. (COMMON M.) Tall perennial ; leaves long-petioled, the 

 lower rounded, palmately lobed, the floral wedge-shaped at base, subentire or 

 3-cleft, the lobes lanceolate ; upper Up of the pale purple corolla bearded. 

 Waste places, around dwellings. (Nat. from Eu.) 



2. L. MARRUBIASTRUM L. Tall biennial, with elongated branches ; stem- 

 leaves oblong-ovate, coarsely toothed; corolla whitish, shorter than the calyx- 

 teeth, the tube naked within; lower lip rather erect. Waste places, etc., Pa. 

 and Del. (Adv. from Eu.) 



3. L. SIBIRICUS L. Tall biennial ; leaves ^-parted, the divisions 2-5-cleft, or 

 deeply 3-7-cleft and incised; corolla purplish, twice as long as the calyx, the 

 upper lip fornicate, the lower little spreading. Waste grounds, Pa. and Del. 

 (Adv. from Eurasia.) 



18. BALL6TA L. FETID HOREHOUND 



Calyx nearly funnel-form ; the 10-ribbed tube expanded above into a spread- 

 ing regular border, with 5-10 teeth. Anthers exserted beyond the tube of the 

 corolla, approximate in pairs. Otherwise much as in Marrubium. (The Greek 

 name, of uncertain origin.) 



