MACLOSKIE: VERBENACE^ 68 1 



b2. Fruit 2-merous. 



c. Calyx truncate or notched. Corolla 4-5-lobed. Drupelets 2. 



2. Lantana, p. 690. 



c2. Calyx 4-cleft or 4-toothed. Corolla 4-lobed. Nutlets 4. 3. Lippia, p. 691. 

 ^3. Calyx 5-toothed. Corolla 5-lobed. Nutlets 2, not separating. 



4. Monopyrena, p. 692. 



A2. Flowers racemose. Fruit 2-4-celled, becoming 4-drupelets. Calyx shortly 5-toothed, be- 

 coming enlarged and enclosing the fruit. Anther cells divergent. 



5. Rliaphithamnus, p. 693. 



i. VERBENA J. St. Hil. 



Flowers perfect, nearly regular, terminally spiked, rarely racemed, or 

 panicled. Calyx inferior, 4-5-merous. Corolla mostly 5-cleft. Sta- 

 mens didynamous, or rarely 2. Style simple; stigmas i or 2. Fruit 

 dry or drupaceous, separating into 4 pyrenes. Endosperm scanty. 



Species 190, chiefly American; i in the Mediterr. region. 



KEY TO THE TRIBES. 



A. ( Verbenaca^) No appendages on connective of upper anthers. 



b. Pungentes. Heads composed of 2 few-flowers, on tops of branches. Small, often cespi- 



tose : carroo, erinacea, seriphioides, etc. 

 62. Nobiles. Spikes capitate when young, afterwards elongating. Creeping undershrubs ; 



calyx long-tubular ; flowers handsome : chamadrifolia, teucrioides, etc. 

 #3. Junciformes. Flowers in heads or short spikes. Leaves reduced, or scale-like glauca. 

 4. Verticiliflorcz. Spikes with remote, quasi -verticils. Corolla-tube long, curved : 



asper, etc. 



A2. (Glandularia.) . Glandular appendage on connective of upper anthers. Leaves divided: 

 erinoides, sulfurea, tenera, etc. 



KEY TO THE SPECIES. 



A. Flowers solitary or subsolitary. Leaves minute. 



b. Leaves linear, hairy. Corolla long. uniflora. 



b2. Leaves ovate, triquetrous. Spiny shrub, decussately branching. Bracts ovate. Flowers 



white-lilac. seriphioides. 



A2. Spikes solitary, terminal; at first usually capitate. 

 b. Spike sessile or nearly so. 



c. Leaves trifid, segments narrow-linear, hispid, pungent. Small, spiny shrub. Corolla 



ochroleucous. ameghinoi. 



c2. Leaves 3 -partite, crowded, segments linear-spatulate. Bracts linear-lanceolate to ovate. 



Corolla long. struthionum. 



CT,. Leaves triquetrous, connate ; as are the bracts. Corolla long. connatibractcata. 



b2. Spikes peduncled. 



c. Spikes subverticillate, lax. Leaves small, alternate; and axillary fascicled, oblong- 

 lanceolate, rough. Calyx 4-cleft. Corolla white. aspera. 



