788 SCROPHULARIACEAE 



lanceolate; corolla 5 mm. long, the spur 4 mm. long; capsule 3-4 mm. long; seeds 1-1.2 mm. 

 long. 



Occasionally naturalized in old fields, as in Humboldt County, California. Type locality: Europe. June- 

 Sept. 



18. MOHAVEA a. Gray, Pacif. R. Rep. 4: 122. 1857. 



Erect annual hairy herbs, the scattered leaves with narrow sessile blades. Flowers 

 axillary to foliose bracts, short-pedicelled in close racemes. Bracteoles none. Sepals 5, 

 distinct. Corolla yellow or yellowish, ventrally slightly pouched at base, 2-lipped, its 

 orifice nearly or quite closed by the large hairy palate. Antheriferous stamens 2 (the 

 ventral pair), the glabrous anthers with divaricate cells. Stigmas wholly united, capitate, 

 borne on the wholly united pubescent persistent styles. Capsule ovoid, cylindric, the cells 

 rupturing widely by irregular transverse distal breaks. Seeds ovate-discoid, flattened, 

 each surrounded by its incurved wing. [Named from the Indian word Mojave, the plant 

 first found on "Mohave Creek."] 



Species 2, of arid western North America. Type species, Mohavea viscida A. Gray. 



Corolla 15-17 mm. long, bright yellow, the ample palate inflated-rounded and distally with fine garnet-brown 

 markings, simply bilabiate, each lip with its free petals extending as ovate lobes from near the margin 

 of the palate; leaves lanceolate; plants with strongly gland-tipped hairs. 1. M. brevtflora. 



Corolla 30-35 mm. long, the narrow palate less inflated, yellow and lined or mottled or distally blotched with 

 dark violet, its lips yellow, each distally expanded and together forming an ample campanulate limb that 

 is pale greenish yellow and marked by radiating dark brown broken lines, each petal distinct near the 

 semitruncate mucronately acuminate tip; leaves linear-lanceolate; plants with obscure gland-tipped hairs. 



2. M. confertifiora. 



1, Mohavea breviflora Coville. Golden Desert Snapdragon. Fig. 4766. 



Mohavea brevifiora Coville, Contr. U.S. Nat. Herb. 4: 168. 1893. 



Stem 1-2 dm. tall, floriferous nearly throughout, the floral leaves lanceolate to ovate- 

 lanceolate, 2-4 cm. long. Pedicels becoming 2-5 mm. long; sepals 10-11 mm. long, lanceolate- 

 attenuate; corolla 15-17 mm. long; capsule 8-10 mm. long; seeds 2-2.5 mm. long, black. 



Gravelly calcareous soil, Lower Sonoran Zone; deserts of Inyo County, southeastern California, to southern 

 Nevada and northwestern Arizona. Type locality: Johnson Canyon, Panamint Mountains, California. March- 

 April. 



2. Mohavea confertifiora (Benth.) Heller. Mohave Flower. Fig. 4767. 



Antirrhinum confertiflorum Benth. in A. DC. Prod. 10: 592. 1846. 

 Mohavea viscida A. Gray, Pacif. R. Rep. 4: 122. 1857. 

 Mohavea confertifiora Heller, Muhlenbergia 8: 48. 1912. 



Stem 2-5 dm. tall, floriferous distally, the leaves all linear or lance-linear, the floral ones 

 6-9 cm. long. Pedicels becoming 5-10 mm. long; sepals 11-13 mm. long, lanceolate-attenuate; 

 corolla 30-35 mm. long; capsule 10-12 mm. long; seeds 2-2.5 mm. long, black. 



Sandy desert. Lower Sonoran Zone; Mojave and Colorado Deserts of southern California to southern Ne- 

 vada and western Arizona. Type locality: California. March- April. 



19. ANTIRRHINUM [Bauhin] L. Sp. PI. 612. 1753. 



Erect or dififuse perennial- or annual-rooted herbs. Leaves scattered, the blades narrow 

 or wide. Flowers racemose, either axillary to foliage leaves or crowded and with much- 

 reduced bracts. Sepals 5, distinct. Corolla cyanic (violet-blue, purple, or white), ventrally 

 pouched at base, 2-lipped, the lower lip with prominent palate. Stamens 4, didynamous. 

 Stigmas united, minute. Capsule asymmetrical, the dorsal cell narrower and opening by 

 a single distal pore, the lower set wholly ventrad to pedicel-apex and opening distally by 

 2 distal pores (or these confluent), the style persisting and deflexed. [Name Greek, mean- 

 ing against the nose, the lower lip closing against the snout-like upper one.] 



About 30 species, most numerous in the Mediterranean Region, and also in California and adjoining terri- 

 tory. Type species. Antirrhinum majus L. 



Uppermost sepal not longer than others; corolla 35 mm. long or more, variously colored, the upper lip arched 

 and projecting beyond the decurved lower lobes, the orifice closed by palate; capsule 10-12 mm. long; 

 escaped from cultivation. 1. A. majus. 



Uppermost sepal longer and larger than others; corolla less than 25 mm. long, violet-blue or purple to white; 

 capsule 3-8 mm. long; indigenous. 

 Leaf-blades over twice as long as wide, cuneate or attenuate to petioles. 



Stems stout, erect from woody roots; corolla purjjle, its palate bladdery-inflated, soon withering to 

 brown; seeds alsout 1 mm. long, the sharp ridges somewhat erose. 

 Plant (including capsule and external surface of corolla) glabrous, the clustered stems simple or 

 virgately branched, 15-20 dm. tall; root clearly perennial; sepals attenuate-lanceolate; leaf- 

 blades lance-linear. 2. A. virga. 

 Plant (including capsule and external surface of corolla) glandular-hirsute, the stem widely 

 branched below, 6-9 dm. tall; root apparently annual; uppermost sepal acute or acutish, the 

 others acuminate-attenuate; leaf-blades oblong-lanceolate. 3. A. multiflorum. 

 Stems slender, from clearly annual roots; corolla blue-violet to white, its palate not so quickly shrivel- 

 ling; seeds usually smaller and less sharply angled. 

 Flowers only toward summit of stem, the dense inflorescence glandular-hirsute, its minute brads 



