284 PROCEEDINGS OP THE AMERICAN ACADEMY. 



* Low slender creeping or erect annuals or perennials : flowers usually small on 

 axillary or terminal pedicels or disposed in terminal cymes : capsule obcordate- 

 depressed or oblong, emarginate, one half to three fourths inferior ; seeds deep- 

 crateriform, open-crateriform, or oblong, peltate and slightly concave on the 

 hilar surface, usually scrobiculate. 



•<- Perennial by filiform rootstocks or creeping stems : flowers axillary or on 



slender terminal pedicels. 



H. c^ RULE A, L,, Sp. PI. i. 105, accredited to Mexico by Hemsley 

 (Biol. Centr.-Am. Bot. ii. 30), is essentially a more northern plant, and 

 probably does not extend into Mexico. 



H. serpyllacea, C. L. Smith, in herb. A low prostrate or creeping 

 perennial : stems quadrangular, suffrutescent : branches ascending, 3 to 

 5 cm. high, glabrous : leaves elliptic-ovate, short-jDetiolate, acute, gla- 

 brous on either surface, margin revolute, hispidulous ; stipules 1-2-long- 

 setiferous with several shorter glandular setse : flowers on short axillary 

 pedicels : calyx-divisions lanceolate, acute, somewhat foliaceous, 2 to 4 mm. 

 long ; corolla fuunelform, about 1 cm. long ; lobes above and the throat 

 pubescent : capsule oblong-obovate, 4 mm. long, one half as broad, about 

 three fourths inferior ; seeds (6 or more) oblong-rotund or a little oblique, 

 peltate, slightly concavo-convex, prominently scrobiculate. — Hedyotis 

 serpyllacea, Schlecht. Linnaea, ix. 599. Mallastoma Shannoni^ Donnell 

 Smith, Bot. Gaz. xviii. 203. — Jalapa, Schiede ; C. L. Smith at Cruz 

 Verde near Jalapa, altitude 2,150 m., no. 1486; Chiapas, Ghiesbreght, 

 no. 814; Guatemala at San Miguel Uspantan, Depart. Quiche, altitude 

 2,150 m., Heyde and Lux (no. 3176 of Donnell Smith's sets). 



•*- -^ Delicate annuals with minute white flowers and erect or spreading corolla- 

 lobes ; seeds open-crateriform, oblong-rotund with a short hilar ridge. 



H. croftise, Britton & Rusby. A depressed annual : stems 1 to 2 

 cm. long, hirtellous with a few scattered hairs, especially near the nodes: 

 leaves oblanceolate, 5 to 15 mm. long, glabrous or with a few scattered 

 hirsutish hairs on the midrib above, margins revolute, ciliate : stipules 

 scarious, laciniate-dentate : flowers minute on short axillary pedicels : 

 calyx including the ovary 2 mm. long, hirsute-pubescent ; lobes acute : 

 corolla white, 3 mm. long ; lobes above short-pubescent : capsule de- 

 pressed-globose, subdidymous, about one fourth inferior, the free portion 

 short-hirsute-pubescent : seeds open-crateriform, oblong-rotund with a 

 short hilar ridge. — Trans. N. Y. Acad. Sci. vii. 10. — San Diego, Duval 

 Co., Texas, Miss Mary B. Croft, no. 85. 



H. parviflora, Holzinger, in litt. A low annual, branching from a 

 single slender root : branches ascending, quadrangular, minutely hispidu- 



