| 2025-09-17 | State trees of North Dakota |
| 2025-09-14 | Trees on the National Mall |
| 2025-08-30 | Targets for bark beetles |
| 2025-07-20 | Stately trees |
| 2025-01-01 | Symbols of wisdom |
| 2024-11-28 | Trees along the National Mall |
| 2024-09-24 | State trees of Massachusetts |
| 2024-02-02 | Shade providers at the National Mall |
| 2024-01-30 | Stately trees |
| 2023-10-02 | Stately trees |
| 2023-07-15 | They form parallel lines along the National Mall |
| 2023-05-15 | Majestic trees |
| 2023-01-31 | Stately trees |
| 2022-08-27 | Trees that canopy Central Park's Literary Walk |
| 2022-08-19 | Eugene O'Neill's "Desire Under the ___" |
| 2022-01-06 | Classic boulevard liners |
| 2022-01-02 | Plantings lining the Literary Walk in Central Park |
| 2021-09-19 | Massachusetts' College of Our Lady of the ___ |
| 2021-04-18 | Eugene O'Neill's "Desire Under the ___" |
| 2021-03-10 | Classic boulevard liners |
| 2021-02-11 | California : palms :: New England : ___ |
| 2020-11-08 | Stately street liners |
| 2020-09-19 | Symbols of hope during the American and French Revolutions |
| 2020-09-18 | The Liberty Tree and others |
| 2020-07-23 | Colonnade trees |
| 2020-06-08 | Blighted trees |
| 2020-04-12 | Trees that line the National Mall |
| 2020-03-09 | Things that suffered a 20th-century blight |
| 2020-03-06 | Eugene O'Neill's "Desire Under the ___" |
| 2019-03-02 | Newport, R.I., estate that's a National Historic Landmark, with "the" |
| 2018-08-18 | National Mall liners |
| 2018-06-19 | Classic street liners |
| 2018-04-23 | Trees attacked by bark beetles |
| 2017-12-06 | Majestic trees |
| 2017-07-17 | Stately shade trees |
| 2016-10-02 | Trees associated with the underworld in Celtic myth |
| 2015-11-30 | Stately hardwoods |
| 2015-04-27 | State symbols of Massachusetts and North Dakota |
| 2015-03-01 | Stately trees |
| 2015-01-22 | Massachusetts' College of Our Lady of the ___ |
| 2014-09-01 | State trees of North Dakota and Massachusetts |
| 2014-07-14 | Shapely shade trees |
| 2014-07-13 | Frequent features of John Constable landscapes |
| 2014-06-23 | O'Neill's "Desire Under the ___" |
| 2014-06-02 | Street-lining trees |
| 2014-03-10 | Stately shaders |
| 2013-08-09 | Chinese ___ (popular bonsai trees) |
| 2013-06-24 | Classic trees on shady streets |
| 2012-07-29 | Group in many a park |
| 2012-07-24 | O'Neill title trees |
| 2012-02-24 | Trees in Gray's country churchyard |
| 2011-07-24 | State symbols of North Dakota and Massachusetts |
| 2011-02-10 | Part of the New Haven landscape |
| 2010-12-03 | Shady group? |
| 2010-08-26 | Shade providers |
| 2010-07-05 | Classic street liners |
| 2010-04-25 | O'Neill's "Desire Under the ___" |
| 2010-02-14 | Sherwood Forest sights |
| 2009-10-05 | Majestic shade trees |
| 2009-07-02 | Raw materials for shipbuilding |
| 2008-10-16 | Historic mansion in Newport, R.I., with "the" |
| 2008-09-24 | Classic Main Street liners |
| 2008-06-03 | "Slippery" trees |
| 2008-04-27 | They're seen in many John Constable paintings |
| 2008-03-07 | Nine ___ (London district) |
| 2008-01-27 | Stately trees |
| 2007-11-15 | Landmark Newport mansion, with "the" |
| 2007-09-18 | Graceful shaders |
| 2006-12-20 | Classic street liners |
| 2006-11-07 | Elegant shade trees |
| 2006-09-25 | Shady giants |
| 2005-12-20 | Trees in an O'Neill title |
| 2005-05-25 | Dutch ___ (uncommon sights nowadays) |
| 2005-04-20 | The shady bunch? |
| 2005-02-01 | Shade trees |
| 2004-12-09 | New Haven, City of ___ |
| 2004-11-21 | "Rock'd the full-foliaged ___": Tennyson |
| 2004-11-15 | Shade trees |
| 2004-10-25 | Stately shade trees |
| 2004-07-18 | Stately stand |
| 2004-05-05 | Dutch disease victims |
| 2004-04-03 | Threatened flora |
| 2004-03-11 | Once-popular street liners |
| 2004-02-23 | Shade trees |
| 2003-10-17 | Some blight victims |
| 2003-08-11 | Shade trees |
| 2003-06-03 | O'Neill's "Desire Under the ___" |
| 2003-04-21 | Shade trees |
| 2003-01-13 | Stately trees |
| 2002-05-05 | Colonnade trees |
| 2001-11-27 | Shade trees |
| 2001-10-03 | Tennyson's "immemorial ___" |
| 2001-09-03 | Shade trees |
| 2001-05-21 | They line some old streets |
| 2000-12-18 | Stately trees |
| 2000-03-21 | "Desire Under the ___" |
| 2000-03-02 | Popular street liners |
| 2000-03-01 | "The moan of doves in immemorial ___": Tennyson |
| 2000-02-27 | Some are slippery |
| 1999-10-02 | "The moan of doves in immemorial ___": Tennyson |
| 1999-05-03 | Shade trees |
| 1998-12-28 | "Desire Under the ___" |
| 1998-10-25 | Classic street liners |
| 1998-02-25 | They may be slippery |
| 1997-02-11 | Stately shaders |
| 1996-10-31 | Some are slippery |
| 1996-10-20 | Items in Gray's country churchyard |
| 1996-05-29 | Shade trees |
| 1996-05-06 | Street shaders |
| 1996-02-26 | "Desire Under the___" |
| 1995-12-15 | Shady ones |
| 1995-10-29 | City of _____ (New Haven, Conn.) |
| 1995-01-03 | "Desire Under the _____" |
| 1994-07-17 | Shady bunch |
| 1994-06-09 | Tennyson's "doves in immemorial _____" |