1. Annual wiry-stemmed North American weed with minute scalelike leaves and small yellow flowers
   - orange grass, pineweed, pine-weed, Hypericum gentianoides

Type of: St John's wort

• semiconductor unit
• semiconscious
• semiconsciousness
• semidark
• semidarkness
• semidesert
• semidetached
• semidiameter
• semiempirical
• semiepiphyte
• semifinal
• semifinalist
• semifluid
• semifluidity
• semiformal
• semigloss
• semihard
• semiliquid
• semiliterate
• semilunar
• semilunar bone
• semilunar cartilage
• semilunar valve
• semimajor axis
• semiminor axis