204 LAMIACEAE 



Bracts thick, resembling the leaves, lanceolate or ovate-lanceolate, obtuse; leaves usually 

 dentate. 5. M. dentala. 



25. MICROMERIA Benth. Tea-vine, Yerba Buena. l. M. Chamissonis. 



24. LYCOPUS (Tourn.) L. Water Horehound, Bugle Weed. 



■Calyx-teeth ovate, obtusish, shorter than the nutlets. 1. L. communis, 



■Calyx-teeth lanceolate or subulate, acute or acuminate, longer than the nutlets. 



Stem and lowei surface of the leaves densely and finely pubescent, the former often 



velvety. 2. L. velutinus. 



Stem sparingly and coarsely pubescent or glabrous ; leaves glabrous or nearly so. 

 Leaves merely coarsely serrate. 



Leaves tapering at the base, rather thin. 3. L. lucidus. 



Leaves rounded at the base, thicker. 4. L. asper. 



Leaves sinuately pinnatifld. .5. L, americanus. 



26. MENTHA (Tourn.) L. Mint, Spearmint, Peppermint. 



Whorls of floTvers forming terminal spikes. 1. M. spicata. 



Whorls of flowers all axillary. 



Stem and petioles densely pubescent with long villous hairs; leaves decidedly pubes- 

 cent. 2. M. lanata. 

 Stem and petioles retrorsely strigose or crisp-hairy with short hairs, or glabrous 

 below; leaves sparingly puberulent or glabrous. 

 Corolla 5-6 mm. long, open-fimnelform ; bracts lanceolate or linear-lanceolate, 

 usually exceeding the flower-clusters ; leaves dark green, not strongly veined. 



3. M. occidenialis. 

 Corolla 4-5 mm. long, salver-shaped-funnelform; bracts linear or subulate, shorter 



than the flower-clusters. 

 Leaf-blades thin, dark green, not strongly veined, tapering gradually into 

 slender petioles, which equal or exceed the flower-clusters. 



4. M. glabrior. 

 Leaf-blades thick, strongly veined, abruptly contracted into short petioles, 



which are much shorter than the flower-clusters. 

 Plant pale green, stout, 4-8 dm. high; calyx-teeth much longer than broad. 



5. M. Penardi. 

 Plant usually purplish, low, 2—4 dm. high; calyx-teeth scarcely longer than 



broad. 6. M. rubella. 



Family 116. SOLANACEAE. Potato Family. 



Fruit a berry. 



Corolla plicate; lobes usually IndupUcate; all our species herbs or vines. 

 Calyx inflated and bladder-Uke in fruit. 



CoroUa open-campanulate, yellow or whitish, often with a darker center; 



seeds finely pitted; fiowers nodding in anthesis. 1. Phtsalis, 



Corolla rotate, violet or purple; seeds rugose-tuberculate; fiowers erect in 

 anthesis. 2. Qoincuia. 



Calyx not bladder-like infiated in fruit. 

 Calyx closely investing the berry. 



Stamens alike, not incUned; low unarmed perennials. 3. CHAMAESARACH.i 

 Stamens dissiinllar, declined; prickly aimuals. 4. Andeocera. 



Calyx not inclosing the berry. 



Anthers short, opening by a terminal pore or short slit. 5. SOLAisruM. 

 Anthers long, tapering to the suramit, opening longitudinally. 



6. Ltcopehsicon. 

 Corolla httle if at all plicate; its lobes valvate; shrubs. 7. Ltcium. 



Fruit a capsule. 



Capsule circumscissile near the top, which separates as a lid ; corolla irregular. 



8. Hyoscyamus. 

 Capsule opening by valves; corolla regular. 



Capsule prickly; seeds flat. 9. Datura. 



Capsule not prickly; seeds scarcely flattened. 10. Nicotiana. 



1. PHYSALIS L. Ground Cherry, Strawberry Tomato, Tomatillo. 

 Annuals, with branching roots; fruiting calyx cordate-ovold, acuminate, strongly 5-angIed 

 Leaves very oblique, cordate, sinuate-dentate; fruiting calyx ovoid. 



1. P. pruinosa. 

 Leaves orbicular or broadly ovite, sinuately crenate, scarcely cordate and scarcely 

 oblique at the base. 2. P. neomexicana. 



Perennials, "with horizontal rootstocks or rarely with woody caudices. 



Pubescence if any not stellate, although in P. pumila with some branched hairs. 

 Leaves and stem glabrous or the veins of the former and the upper part of the 

 latter with scattered appressed hairs. 

 Leaves ovate, ovate-lanceolate, or oval. 3. p. subglabrata 



Leaves lanceolate, oblanceolate, or linear. 4. p. longifolia 



Leaves and stem more or less pubescent "with spreading hairs. 



Pubescence sparse, consisting of flat, sometimes jointed hairs, scarcely viscid 

 Fruiting calyx ovoid, scarcely angled and scarcely sunken at the bzise- 

 leaves thick, oblanceolate or spatulate to rhombic, subentire ' 



Leaves oblanceolate or spatulate; hairs all simple. 



