BEOMELIACEAE. 39 



1. PONTEDERIA L. Bog herbs. Leaf -blades narrow or broad, on 

 tapering petioles. Spadix many-flowered. Perianth 2-lipped, the lobes nearly 

 equal. Anthers versatile. Ovary 1-celled. Seed solitary. 



1. P. cordata L. Leaves with tapering petioles and deltoid to ovate blades 

 10-20 cm. long (or with linear-lanceolate or lanceolate blades, P. cordata 

 lancifolia) : perianth bright-blue or white; tube 7-10 mm. long; limb 9-14 

 mm. broad, the lobes shorter than the tube. Everglades. (Cuba.) PICKEREL- 

 WEED. WAMPEE. 



FAMILY 5. BROMEUACEAE. PINEAPPLE FAMILY. 



Epiphytic or rarely terrestrial herbs, commonly with scurfy foliage. 

 Leaves usually crowded at the base of the stem: blades entire or spiny- 

 toothed. Flowers perfect, regular, solitary or spicate. Calyx of 3 sepals. 

 Corolla of .3 narrow petals. Androecium of 3-6 stamens. Gynoeciurn 

 3-carpellary, the ovary superior or inferior: styles united. Ovules numer- 

 ous. Fruit baccate or capsular. 



Ovary superior : fruit capsular : leaves spineless. 

 Sepals, and petals, distinct : filaments free. 



Style filiform : capsule elongate : seed-appendage straight. 



Drooping plants, with the flowers axillary to leaf-like bracts and remote. 



1. DEXDROPOGOX. 

 Upright plants, with the flowers in distichous bracted 



spikes. 2. TILLANDSIA. 



Style short or wanting : capsule ovoid : seed-appendage 



folded. 3. CATOPSIS. 



Sepals, and petals, partially united : filaments partially ad- 



nate to the corolla. 4. GUZMANXIA. 



Ovary inferior : fruit a syncarp, baccate : leaves spiny. 5. ANANAS. 



1. DENDROPOGON Eaf. Pendent festoon-like plants, with regularly 

 leafy stems. Leaves remote: blades linear-filiform above the base. Flowers 

 axillary. 



1. D. usneoides (L.) Eaf. Plant clothed with silver-gray scales. Stems fili- 

 form, often greatly elongate: leaves 2.5-8 cm. long: flowers fragrant: sepals 

 5-7 mm. long, green: petals linear-spathulate, about twice as long as the 

 sepals, yellow or yellowish: capsules 15-30 mm. long. Hammocks. F. K. 

 (Bah., Cuba, Ant.} LONG-MOSS. SPANISH-MOSS. FLORIDA-MOSS. 



2. TILLANDSIA L. Erect plants, with scape-like stems. Leaves mostly 

 basal and crowded, those of the stem more or less reduced: blades tapering 

 from a broad base. Flowers in terminal simple or branched spikes, the bracts 

 firm. Sepals, and petals, distinct. Filaments, and anthers, free. AIR-PLANT. 



Flowering stems scape-like, filiform or nearly so, with 1 or 2 Inconspicuous sheath- 

 ing scales. 1. T. recurrala. 

 Flowering stems conspicuously leafy, their leaves smaller than 



the basal ones. 

 Basal leaves about as long as the stems or surpassing them. 



Leaf-blades less than 2 cm. broad at the base. 2. T. tenuifolia. 



Leaf-blades more than 2 cm. broad at the base. 



Leaves dilated at the base but not bladder-like, erect 



or ascending, nearly straight. 



Bracts ribbed : leaf-blades tender, flat or nearly so. 3. T. Valenzuelana. 

 Bracts not ribbed : leaf-blades rigid, Involute. 4. T. fasciculata. 



Leaves with bladder-like dilations at the base, dif- 

 fusely spreading and twisted. 5. T. Balbisiana. 

 Basal leaves shorter than the stems. 



Bracts and flowers erect or appressed to the rachis. 

 Leaves of the stem with long spreading or recurved 



tips. (5. T. circinata. 



Leaves of the stem merely clasping scales. 7. T. utrictilata. 



Bracts and flowers more or less strongly spreading. 8. T. aloifolia. 



