588 MISC. PUBLICATION 42 3, U. S. DEPT. OF AGRICULTURE 



83. PASSIFLORACEAE. Passionflower family 



1. PASSIFLORA. 86 Passionflower 



Plants herbaceous or suffrutescent, the stems trailing or climbing? 

 with tendrils opposite the leaves, these alternate, deeply lobed; 

 flowers perfect, regular, normally 5-merous, on 1 -flowered axillary 

 peduncles, these often in pairs; petals rarely wanting; calyx throat bear- 

 ing a conspicuous fringed crown; filaments united below into a tube 

 enveloping the stipitate ovary; fruit a fleshy berry with numerous 

 seeds. 



The Arizona passionflowers are relatively inconspicuous, but some 

 of the species of this chiefly tropical genus are highly prized cultivated 

 ornamentals with very handsome large flowers. Two species, P. 

 quadrangularis , the granadilla, and P. edulis, are cultivated for their 

 fruits, the latter especially in Australia. The fruits are eaten directly 

 or are used for flavoring ices, etc., and for making fruit sirup. 



Key to the species 



1. Leaves deeply 2-lobed, the lobes ascending, the margin entire; stipules narrowly 

 linear or setaceous; seeds transversely sulcate; plant glabrous. 



1. P. MEXICANA. 



1. Leaves 3- to 5-lobed, the lateral lobes divaricate, the margin dentate, denticulate, 

 or sinuate; stipules semiovate or pinnatisect; seeds reticulate; plant 

 pubescent nearly throughout (2) . 

 2. Petioles biglandular near the apex; bracts setaceous; stipules semiovate; 

 corona 1 -ranked; ovary glabrous; stem and leaves hispidulous. 



2. P. BRYONIOIDES. 



2. Petioles glandless; bracts deeply pinnatisect, with filiform divisions; stipules 

 pinnatisect; corona in several ranks; ovary pilose; stem and leaves 

 grayish-villous 3. P. foetida. 



1. Passiflora mexicana Juss., Paris Mus. Hist. Nat. Ann. 6: 108. 



1805. 

 Cochise, Santa Cruz, and Pima Counties, 3,000 to 5,000 feet, 

 usually along streams, sometimes on dry mesas, July and August. 

 Southern Arizona and Mexico. 



2. Passiflora bryonioides H. B. K., Nov. Gen. et Sp. 2: 140. 1817. 

 Near Kuby, Santa Cruz County (Harrison 5644, Goodding in 1936), 



about 4,000 feet, August and September. Southern Arizona and 

 Mexico. Petals white, the crown purple. 



3. Passiflora foetida L., Sp. PL 959. 1753. 



Canyons on west side of the Baboquivari Mountains (Pima County), 

 about 4,000 feet, thickets, August and September. Almost throughout 

 tropical and subtropical America. 



Represented in Arizona by var. arizonica Killip, known only from 

 Arizona and Sonora, type from the Baboquivari Mountains (Harri- 

 son 4774). The plant has a rank disagreeable odor. The flowers are 

 apparently vespertine, and have a lilac-colored corona. 



84. LOASACEAE. Loasa family 



Plants annual or perennial, herbaceous or suffrutescent ; herbage 

 rough-pubescent, the hairs often barbed, sometimes stinging; stems 



86 Reference: Killip, Ellsworth P\ the American species of passifloraceae. Field Museum 

 Nat. Hist. Bot. Ser. 19: 1-613. 1938. 

 The key to the Arizona species was contributed by Mr. Killip. 



