568 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
KEY TO THE SPECIES. 
Plants glaucous, more than a meter high, woody below......... 1. N. glauca. 
Plants densely viscid, green, less than a meter high, herbaceous 
throughout. 
Leaves clasping at the base; flowers diurnal. .............. 2. N. trigonophylla, 
Leaves petiolate, not clasping; flowers nocturnal. ......... 3. N. attenuata. 
1. Nicotiana glauca Graham, Edinburgh Phil. Journ. 1828: 174. 1828. 
TYPE LOCALITY: Cultivated from seeds received from Buenos Aires. 
RanaeE: South America; abundantly introduced into southern North America 
from Texas to southern California and Mexico. 
New Mexico: One mile south of Kingston ( Metcalfe 1009). 
2. Nicotiana trigonophylla Dunal in DC. Prodr. 13': 562. 1852. 
TYPE LocaLity: Aguas Calientes, Mexico. 
Ranae: Western Texas to southern California and southward. 
New Mexico: Fairview; Carlisle; Mangas Springs; Kingston; Dog Mountains; 
mountains west of San Antonio; Tortugas Mountain; Organ Mountains; Tularosa; 
Lincoln; Lakewood. Canyons, in the Lower and Upper Sonoran zones. 
3. Nicotiana attenuata Torr.; S. Wats. in King, Geol. Expl. 40th Par. 5: 276. pl. 
27. f. 1. 1871. 
Type Locauity: Not definitely stated. 
Ranae: California to Utah and Texas. 
New Mexico: Aztec; Carrizo Mountains; Silver City; Mangas Springs; Berendo 
Creek. Sandy plains, Upper Sonoran Zone. 
3. PETUNIA Juss. 
Diffuse prostrate annual with numerous small entire leaves and inconspicuous soli- 
tary axillary flowers; calyx of 5 narrow sepals united only at the base; corolla funnel- 
form, pale purplish red, about 5 mm. long; capsules ovoid, 3 to 4 mm, long, surpassed 
by the calyx lobes. 
1. Petunia parviflora Juss. Ann. Mus. Paris 2: 216. pl. 47. 1803. 
Type Locauity: ‘“‘De l’embouchure de la Plata.” 
Range: Southern Florida to Texas and southern California; also in tropical America. 
New Mexico: Albuquerque; Mesilla Valley. Waste ground and along stream beds, 
in the Lower Sonoran Zone. 
4. LYCIUM L. Tomaritua. 
Shrubs with divaricate branches, many of them ending in spines; leaves alternate 
or often fascicled, thickish, entire or undulate; flowers mostly in few-flowered axillary 
cymes; calyx of 5 sepals united at the base, persistent in fruit; corolla funnelform to 
almost salverform, greenish or purplish, 5-lobed; stamens mostly exserted; ovary 2- 
celled; berries globose, fleshy, scarlet. 
KEY TO THE SPECIES. 
Stems slender, recurved or climbing; introduced plant. ........ 4. L. halimifolium. 
Stems stout; native plant. 
Flowers greenish, 20 mm. long; older branches dark reddish 
brown... 2.2.2. e ee eee eee eee eee 1. L. pallidum. 
Flowers purplish, 12 mm, long or less; branches grayish. 
Corolla 8 to 12 mm. long; leaves large, numerous.......- 2. L. torreyt. 
Corolla 5 mm. long, leaves small... ................ ... 3. L. parviflorum. 
