Chihpris. ACANTHACE^E. 587 



valves which fall away from the placentiferous partition or replum. Seeds large, 

 winged or appendaged ; the kernel consisting of the flat embryo : cotyledons broad 

 and foliaceous : radicle short. 



A large order in the tropics, and with a few representatives in the temperate zones, especially 

 in America, such as the Trumpet-Creeper ( Tecoma radicans) and the Catalpa-tree in the Atlantic 

 States. There are some true Bignoniaceoe in the southern part of Lower California ; but in our 

 State only one, and that barely along the southeastern frontiers. 



MARTYNIA (Unicorn-plant) is represented by a species or two in Lower California and Arizona, 

 but none is known along or near our boundary. They are viscid and rank-scented herbs, with a 

 sort of drupaceous imperfectly 2 - 5-celled fruit, and thick-coated wingless seeds. M. PROBOS- 

 CIDEA, Glox., the common Unicorn-plant, sometimes cultivated in gardens, is not unlikely to 

 occur in California as an introduced plant. These plants, with Sesamum and some other genera, 

 constitute the order or suborder PEDALINE.E. 



1. CHILOPSIS, Don. DESERT- WILLOW. 



Calyx membranaceous, ovate in the bud, irregularly bilabiate, often split deeper 

 on one side. Corolla funnelform, ventricose above, with an ample bilabiately 

 5-lobed spreading limb ; the rounded lobes erose and undulate. Stamens 4 and a 

 sterile filament : cells of the anther naked and diverging. Capsule long and linear, 

 terete, resembling that of Catalpa, 2-celled with the at length loose narrow partition 

 contrary to the valves. Seeds oblong, thin, with the wing at each end dissected 

 into a woolly or fine bristly tuft. Cotyledons 2-lobed. Don in Edinb. Phil. Jour, 

 ix. 261 ; DC. Prodr. ix. 227. A single species. 



1. C. saligna, Don, 1. c. Shrub or tree, 10 to 20 feet high, with hard wood, 

 willow-like, pubescent when young, soon glabrous, with slender branches bearing 

 numerous leaves : these linear or linear-lanceolate, 4 to 6 inches long, opposite, 

 whorled, or mostly irregularly alternate, entire, slightly glutinous when old : flowers 

 in a short terminal raceme : corolla one or two inches long, white and purplish : cap- 

 sule 6 to 10 inches long. C. linearis, DC. 1. c. Bignonia (?) linearis, Cav. Ic. iii. 

 t. 269. 



Along water-courses, San Bernardino and San Diego counties, and through the arid interior 

 region to the borders of Texas and the northern part of Mexico. 



J 



ORDER LXXII. ACANTHACE-2E. 



Like Scrophulariacece in general character, except in the capsule and seeds. 

 Flowers perfect, mostly with bractlets at the base of the calyx. Ovary 2-celled, 

 with placenta in the axis, bearing few or definite anatropous ovules in each cell. 

 Capsule 2-celled, few-seeded. Seeds borne on hook-like or rarely cupshaped pro- 

 cesses of the placenta (retinacula), destitute of albumen. Cotyledons broad and 

 flat. Corolla with lobes either imbricated or convolute in the bud. 



A very large family, chiefly in and near the inter-tropical regions ; a few in the Eastern United 

 States extending even to the Great Lakes ; a larger number along the southern border of the 

 United States ; one or two only known to occur within the borders of the State of California, but 

 several not far distant. One or two species of Thunbergia, commonly represent the order in 

 cultivation. The herbage is bland or slightly bitter, and destitute of active properties. 



* Stamens 4 : corolla hardly or only slightly bilabiate. 



1. Ruellia. Anthers 2-celled. Corolla convolute in the bud. Capsule several-seeded. 



2. Berginia. Anthers 1 -celled. Corolla imbricated in the bud. Capsule 4-seeded. 



* * Stamens only 2 : anthers 2-celled : corolla strongly bilabiate : capsule 4-seeded. 



3. Beloperone. Anthers with lower cell spurred or pointed at base. Flowers 1-bracted. 



4. Dicliptera. Anther-cells pointless. Flowers 1 to 3 between a pair of valvate bracts. 



