230 ' CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



1. PORTULACA L. Purslane. 



Fleshy annuals or perennials with terete or flattened leaves; calyx 2-cleft, the tube 

 cohering with the ovary; petals 5, rarely 6, fugacious; stamens 7 to 20; style 3 to 8- 

 parted; pod 1-celled, many-seeded, the upper part separating as a lid. 



KEY TO THE SPECIES. 



Leaves terete, hairy in the axils. 



Petals carmine to purple, 2 to 4 mm. long; seeds blackish... 1. P. pilosa. 

 Petals yellow or copper-colored; seeds black or red. 



Petals 6 to 10 mm. long; seeds blackish 2. P. suffrutcscens. 



Petals about 2 mm. long; seeds red 3. P. parvula. 



Leaves flat, not hairy in the axils. 



Petals acute; capsule with a crownlike border near the mouth. 4. P. lanceolata. 

 Petals notched; capsule without a crownlike border. 



Sepals acute; styles 5 to 7; seeds granulate 5. P. oleracea. 



Sepals obtuse; styles 3 or 4; seeds sharply tuberculate. . 6. P. retusa. 



1. Portulaca pilosa L. Sp. PI. 445. 1753. 



Type locality: "Habitat in America meridionali." 



Range: Florida to Missouri and California and southward. 



New Mexico: Tortugas Mountain. Sandy soil, in the Lower Sonoran Zone. 



2. Portulaca suffrutescens Engelm. Bot. Gaz. 6: 236. 1881. 



Type locality: Western New Mexico at the Copper Mines. Type collected by 

 Wright (no. 874). 



Range: Western Texas to Arizona and southward. 



New Mexico: Santa Rita; Telegraph Mountains; Mangas Springs; Kingston; Tor- 

 tugas Mountain; Organ Mountains. Dry hills, in the Lower Sonoran Zone. 



3. Portulaca parvula A. Gray, Proc. Amer. Acad. 22: 274. 1887. 



Type locality: "On the plains of W. Texas and New Mexico, and in Mexico." 

 Range: Western Texas to southern Arizona and southward. 

 New Mexico: Mesilla Valley (Wooton). Lower Sonoran Zone. 



4. Portulaca lanceolata Engelm. Bost. Journ. Nat. Hist. 6: 154. 1850. 

 Type locality: "Granite region of the Liano, in Western Texas." 

 Range: Texas to Arizona. 



New Mexico: Berendo Creek; north of Deming. Lower Sonoran Zone. 



5. Portulaca oleracea L. Sp. PI. 445. 1753. Common purslane. 

 Type locality: "Habitat in Europa australi, India, Insula Ascensionis, America." 

 Range: Common in cultivated ground throughout most of North America, extend- 

 ing into South America; in the Old World. 



New Mexico: Cultivated and waste ground throughout the State. 



6. Portulaca retusa Engelm. Bost. Journ. Nat. Hist. 6: 154. 1850. 

 Type locality: "Granite region of the Liano in western Texas." 

 Range: Arkansas to Texas and Arizona. 



New Mexico: Rio Alamosa; Gilmores Ranch; Tortugas Mountain. Sandy soil, 

 Lower Sonoran to Transition Zone. 



2. TALINOPSIS A. Gray. 



A low shrub, 60 cm. high or less, with slender branches; leaves linear, nearly terete; 

 flowers few, purple, in a terminal cyme; fruit about 24 mm. long, covered by the 

 persistent calyx. 



