WOOTON AND STANDLEY FLORA OF NEW MEXICO. 567 



1. DATURA L. Thorn-apple. 



Rank, ill-smelling, annual or perennial herbs with coarse stems, alternate simple 

 leaves, and large axillary solitary flowers; calyx with a long angled tube, often cir- 

 cumscissile near the base; corolla funnelform, white to violet, with a plaited 5-lobed 

 limb, the lobes abruptly acuminate; ovary 2-celled or falsely 4-celled; capsules large, 

 prickly, 4-valved or opening irregularly. 



KEY TO THE SPECIES. 



Corolla 15 to 20 cm. long; capsules rather fleshy, bursting irregu- 

 larly 1. D. meteloides. 



Corolla 10 cm. long or less; capsule dry, 4-valved. 



Leaves sinuate-pinnatifid ; spines of the capsule long and 



stout, few 2. D. quercifolia. 



Leaves sinuately angled or toothed; spines short, slender, 

 numerous. 



Corolla white; lower spines of capsules shorter 3. D. stramonium. 



Corolla violet; spines of the capsules all alike 4. D. tatula. 



1. Datura meteloides DC; Dunal in DC. Prodr. 13 1 : 544. 1852. 

 Type locality: "In calidis Novae LTispaniae regionibus." 

 Range: Colorado and western Texas to California and southward. 



New Mexico: Cedar Hill; San Ildefonso; Zuni; Albuquerque; Lake Valley; Mangas 

 Springs; Kingston; Rio Frisco; Dog Spring; Organ Mountains; Mesilla; south of Ros- 

 well; White Mountains. Dry hills and mesas, in the Lower and Upper Sonoran 

 zones. 



A very handsome plant, bearing numerous large, pure white, rather heavily scented 

 flowers. It is abundant on sandy mesas, especially along arroyos. 



2. Datura quercifolia H. B. K. Nov. Gen. & Sp. 3: 7. 1818. 



Type locality: "Crescit loeis temperatis Regni Mexicani prope Zelaya et Molino 

 de Sarabia, alt. 930 hex." 



Range: Texas and Arizona to Mexico. 



New Mexico: Santa Fe; Albuquerque; Glorieta; Fort Bayard; Mangas Springs; 

 Mimbres; Mesilla Valley. Waste and cultivated ground. 



A not uncommon weed along ditch banks. 



3. Datura stramonium L. Sp. PI. 179. 1753. 



Type locality: "Habitat in America, nunc vulgaris per Europam." 

 Range: Throughout eastern and southern North America; introduced in New 

 Mexico. 

 New Mexico: Fresnal (Wooton). Waste ground. 



4. Datura tatula L. Sp. PI. ed. 2. 25G. 1762. 

 Type locality: Not stated. 



Range: Throughout the warmer parts of North America, widely introduced else- 

 where. 



New Mexico: Farmington; Cedar Hill. Waste ground. 

 Introduced into New Mexico from the Bast. 



2. NICOTIANA L. TOBACCO. 



Clammy-pubescent or glabrous herbs or shrubs, with ample, alternate, entire or 

 undulate leaves and terminal panicles of white or yellow flowers; calj \ campanulate 

 to tubular, .", lobed; corolla hinnelform or Balverform, with an elongated tube; stamens 

 included; capsule 2-celled, 2 to 4-valved from the apex; seeds small, very numerous. 



