242 PROCEEDINGS OP THE AMERICAN ACADEMY. 



specimen no. 921 was collected in Mexico. With P. t an aceti folia. 

 Beuth., the species here described has little more than generic affinity. 

 In certain forms of P. tanacetifolia the leaves are not unlike those of 

 P. Goulteri, but the smaller flowers, shorter calyx, and smaller ovoid cap- 

 sule of the latter readily separate the two species. 



Hemsley, in the Biologia Ceutrali-Americana, Botany, ii. 359, refers 

 the Coulter plaut above cited to P. glandulosa Nutt. A careful compar- 

 ison of P. Coulteri with the type and with authentic material of Nuttall's 

 species shows very clearly that we have to deal with two quite distinct 

 plants. Contrasted with P. glandulosa the Mexican P. Coulteri differs 

 in having more divided leaves, smaller flowers, shorter capsules, and a 

 more villous-hirsute stem. Habitally P. Coulteri most closely resembles 

 P. neo-mexieana, Thurber (P. alba, Rydb.), but here again the some- 

 what more divided leaves, the subentire corolla-lobes, constantly shorter 

 and more ovoid capsule, and smaller seeds of the former enable one to 

 distinguish it at once from the Thurber species. 



Mimophytum, n. gen. of Boraginaceae . Calyx 5-parted, persistent 

 but not enlarged in fruit. Corolla tubular-campanulate, with a short 

 tube and a spreading 5-lobed limb, bearing in the throat 5 blunt folds or 

 scales; lobes 5, imbricated. Stamens 5, adnate to the corolla-tube, 

 included; anthers small, obtuse. Ovary 4-lobed ; style terete; stigma 

 compressed-capitate ; ovules subhorizontal. Nutlets 4, sometimes only 

 1 or 2 attaining maturity, depressed, obliquely affixed to the gynobase, 

 and when removed revealing an ovate-triangular scar, convex above, 

 flattened beneath, glochidiate over the entire upper surface. Seeds sub- 

 horizontal. Herbaceous perennials with trailing habit, alternate leaves, 

 racemose inflorescence, and pale blue or whitish flowers. 



M. omphalodoid.es, n. sp. Stems 6 dm. or more in length, some- 

 what bifurcately branched, glabrous or sparingly pubescent : leaves 

 petiolate ; blade ovate, acuminate, 2 to 7 cm. long, 1 to 4 cm. broad, 

 acute, entire, deeply cordate, dark green and sparingly sub-appressed- 

 hirsute above, becoming somewhat tuberculate in age, paler and strigillose 

 beneath, thin and membranous, 5-7-nerved from the base ; petioles slen- 

 der, 1 to 6 cm. in length, pubescent with spreading hairs : inflorescence 

 terminating the stem and branches in elongated slender subsecund 

 strigillose racemes ; pedicels filiform, 2 cm. or less in length, spreading 

 or somewhat recurved: calyx about 4 mm. high, deeply 5-parted; 

 divisions lance-oblong, acute : corolla 5 to 6 mm. long, 5-lobed to near 

 the middle; tube upwardly expanded, bearing in the throat opposite the 

 base of each lobe an oblong blunt fold or scale somewhat pruinose on the 



