Chilopsis. ACANTHACEJ3. 587 



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

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

 and foliaceons : 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 (Teamux radicans) and the Catalpa-tree in the Atlantic 

 States. There are some true Biijnoniticece 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. peobos- 

 CIDEA, Linn., 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 Pedalixe^:. 



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 line bristly tuft. Cotyledons 2-lobed. — Don in Edinb. Phil. Jour, 

 ix. 2G1 ; 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 incites long, opposite, 

 whaled, 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. Ie. iii. 

 t. 209. 



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. 



Order LXXII. ACANTHACE^EJ. 



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

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

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

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

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

 Hat. 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 I talifornia, bat 

 several not far distant, one in- tun species "f Thunbergia commonly represent the order in 

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



• Stamens I : corolla hardly or only slightly bilabiate. 



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

 '_'. Berginia. Anthers 1-collcd. Corolla imbricated in the bud. Capsule 4-seeded. 



« • Stamens only -J : anthers 2-celled : corolla strongly bilabiate : capsule l-s led. 



X Beloperone. anthers with lowi r cell sparred or point.. I at has,-. Flowers I -brae ted. 

 I. Dicliptera. Anther-cells pointless. Flowers 1 to 8 between a pair of valvatebrai 



