Chihj.sis. ACANTIIACEyE. 587 



valvca wliicli full away from the j)lacf>ntifcrnus pnrlitioii or ropliini. Seeds largo, 

 winged or appendaged ; the kernel consisting of tlio (lat embryo : cotylcdona broad 

 and foliaceous : radicle short. 



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

 in America, such a.s the Tninipet-Creeiier (Trcoma rndimns) and the (,'atjilpa-tree in tiie Atlantic 

 States. There are some tnie Jiiffnoyiinccrc in the soutlicrn part of Lower California ; but in our 

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



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

 but none is known along or near our boundtiry. '1 ney are viscid and nink-scented herbs, with a 

 sort of drupaceous imperfectly 'i-.'l-celled fruit, and thick-coated wingless seeds. M. I'UOBOS- 

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

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

 constitute the order or suborder PKnAMNE,?;. 



1. CHILOPSIS, Don. I)KSKin-Wii,i,ow. 



Calyx membranaceons, ovate in the bud, irregularly bilal)iate, often split deeper 

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

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

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

 terete, resembling that of Catafpa, 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. sallgna, Don, 1. c. Shrub or tree, 10 to 20 foot high, with hard wood, 

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

 numerous leaves : these linear or linear-lanc(>olato, 4 to inchos long, opposite, 

 whorlcd, or mostly irregularly alternate, entire, slightly glutinous when old : llowers 

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

 sule 6 to 10 inches long. — C. linearis, ])C. 1. c. Bignonia (?) lincark, 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. 



Order LXXII. ACANTHACEiE. 



Like Scrophulariace(B 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-celIed, few-seeded. Seeds borne on hook-like or rarely cupshapod pro- 

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

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



A very largo family, chiefly in nnd near the inter-iropicnl regions ; a few in tlio Eastern United 

 States extemling even to the(!reat Lakes; a larger number along (he southern border of tho 

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

 several not far distant. One or two species of Thiinhrrrjia commonly lepresent the order in 

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



* Stamens 4 : corolla hardly or only slightly bilabiate. 



1. Ruellla. Anthers 2-celled. Corolla convolute in the bud. Ca))Mide sevetal-.seedeil. 



2. Berglnia. Anthers 1 -colled. Corolla imbricated in the bud. Capsule 4-secded. 



* * 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-eells pointless. Flowers 1 to 3 between a pair of valvate bracts. 



